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# Simulation output
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Particle data
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=============
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Arepo supports various formats for in- and output, which are essentially the same
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as in GADGET-2. Format 1 and format 2 are binary outputs and the main reason
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why they are still supported is to allow the use of initial conditions from
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well-tested initial condition codes that write one of these formats.
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For output (or when creating new initial condition generating code), the
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authors recommend the format 3, which is an HDF5 format. Many of the examples
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create the initial conditions in HDF5 with the ``examples/*/create.py`` python
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script.
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.. table:: **Fields for the particle data output**
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Field name | Block ID | Units | Description |
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+=============================+==============+================================================================================================================+=====================================================================================================================================+
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| Coordinates | POS | :math:`\text{UnitLength}` :math:`a \, h^{-1}` | Comoving position; for cells: position of mesh-generating point |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Velocities | VEL | :math:`\text{UnitVelocity}` :math:`a^{0.5}` | Velcoity |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| ParticleIDs | ID | | Unique ID of particle |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Masses | MASS | :math:`\text{UnitMass}` :math:`h^{-1}` | Mass, if not present: header/MassTable |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Potential | POT | :math:`\text{UnitVelocity}^2` :math:`a^{-1}` | Gravitational potential energy (``OUTPUTPOTENTIAL``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| InternalEnergy | U | :math:`\text{UnitVelocity}^2` | Specific internal energy |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Density | RHO | :math:`\text{UnitMass}` :math:`\text{UnitLength}^{-3}` :math:`a^{-3} \, h^2` | Density of gas |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Pressure | PRES | :math:`\text{UnitLength}^{-3}` :math:`\text{UnitMass}^1` :math:`\text{UnitVelocity}^2` :math:`a^{-3} \, h^2` | Thermal pressure of gas (``OUTPUT_PRESSURE``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| SoundSpeed | CSND | :math:`\text{UnitVelocity}` | Effective sound speed of both thermal and magnetic component (note different `a` scaling compared to VEL!) (``OUTPUT_CSND``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| ElectronAbundance | NE | | Electron number density relative to hydrogen (``COOLING``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| NeutralHydrogenAbundance | NH | | Neutral hydrogen fraction (``COOLING``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| StarFormationRate | SFR | :math:`\text{Msun} \, \text{yr}^{-1}` | Star formation rate (``USE_SFR``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| VelocityDivergence | DIVV | :math:`\text{UnitVelocity}` :math:`\text{UnitLength}^{-1}` :math:`h` | Velocity divergence (``OUTPUT_DIVVEL``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| VelocityCurl | ROTV | :math:`\text{UnitVelocity}` :math:`\text{UnitLength}^{-1}` :math:`h` | Rotation of velocity (``OUTPUT_CURLVEL``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| CoolingHeatingEnergy | COHE | :math:`\text{UnitLength}^{-1}` :math:`\text{UnitVelocity}^3` :math:`\text{UnitMass}` | Actual cooling rate, differing from nominal coolnig rate in star forming cells (``OUTPUT_COOLHEAT``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| SurfaceArea | AREA | :math:`\text{UnitLength}^2` :math:`a^2 \, h^{-2}` | Surface area of a Voronoi cell (``OUTPUT_SURFACE_AREA``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| NumFacesCell | NFAC | | Number of faces of a Voronoi cell (``OUTPUT_SURFACE_AREA``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| CoolingRate | COOR | :math:`\text{erg} \, \text{cm}^3 \, \text{s}^{-1}` | The cooling rate of a gas cell (e.g. Lambda_net/n_H^2). (``OUTPUTCOOLRATE``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Vorticity | VORT | :math:`\text{UnitVelocity}` :math:`\text{UnitLength}^{-1}` :math:`h` | Vorticity of a cell (``OUTPUT_VORTICITY``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| PressureGradient | GRAP | :math:`\text{UnitLength}^{-4}` :math:`\text{UnitMass}` :math:`\text{UnitVelocity}^2` :math:`a^{-4} \, h^3` | Gradient of the pressure (limited) (``OUTPUT_PRESSURE_GRADIENT``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| DensityGradient | GRAR | :math:`\text{UnitLength}^{-4}` :math:`\text{UnitMass}` :math:`a^{-4} \, h^3` | Gradient of the density (limited) (``OUTPUT_DENSITY_GRADIENT``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| VelocityGradient | GRAV | :math:`\text{UnitLength}^{-1}` :math:`\text{UnitVelocity}^1` :math:`h` | Gradient of the velocity (limited) (``OUTPUT_VELOCITY_GRADIENT``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| BfieldGradient | GRAB | :math:`\text{UnitMass}^{0.5}` :math:`\text{UnitVel}` :math:`\text{UnitLength}^{-5/2}` :math:`h^2 \, a^{-3}` | Gradient of the magnetic field (limited) (``OUTPUT_BFIELD_GRADIENT``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Volume | VOL | :math:`\text{UnitLength}^3` :math:`a^3 \, h^{-3}` | (comoving) volume of gas cell. Can be calculated by Masses / Density. (``OUTPUT_VOLUME``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| VertexVelocity | VEVE | :math:`\text{UnitVelocity}` :math:`a^1` | velocity of the mesh-generating point (``OUTPUT_VERTEX_VELOCITY``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| MaxFaceAngle | FACA | | Maximum face angle of cell, quantifies roundness (``OUTPUT_MESH_FACE_ANGLE``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| CenterOfMass | CMCE | :math:`\text{UnitLength}` :math:`a^1 \, h^{-1}` | Center of mass of cell. Generally not equal to position of mesh generating point ``POS`` (``OUTPUT_CENTER_OF_MASS``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| task | TASK | | MPI task this particle is at (``OUTPUT_TASK``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| TimebinHydro | TBH | | Time bin the cell is at (``OUTPUT_TIMEBIN_HYDRO``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| TimeStep | TSTP | :math:`\text{UnitLength}` :math:`\text{UnitVelocity}^{-1}` :math:`h^{-1}` | Timestep in code units (``OUTPUTTIMESTEP``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Acceleration | ACCE | :math:`\text{UnitVelocity}^2` :math:`\text{UnitLength}^{-1}` :math:`a^{-1} \, h` | Acceleration due to gravitational forces, including external potential; different a scaling than internally!(``OUTPUTACCELERATION``)|
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Softenings | SOFT | :math:`\text{UnitLength}` :math:`a \, h^{-1}` | Gravitational softening length of particle/cell (``OUTPUT_SOFTENINGS``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| GravityInteractions | GINT | | Number of foce calculations in tree (``OUTPUTGRAVINTERACTIONS``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| MagneticField | BFLD | :math:`\text{UnitLength}^{-1.5}` :math:`\text{UnitMass}^{0.5}` :math:`\text{UnitVel}` :math:`h \, a^{-2}` | Magnetic field (in code units but Gauss system; note that internally, the Heaviside-Lorentz system is used) (``MHD``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| MagneticFieldDivergence | DIVB | :math:`\text{UnitLength}^{-2.5}` :math:`\text{UnitMass}^{0.5}` :math:`\text{UnitVel}` :math:`h^2 \, a^{-3}` | Divergence of magnetic field (``MHD``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| PassiveScalars | PASS | | Mass fraction of passive scalar quantity in cell (``PASSIVE_SCALARS``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| SubfindDensity | SFDE | :math:`\text{UnitLength}^{-3}` :math:`\text{UnitMass}` :math:`a^{-3} \, h^2` | density around particle (SPH like estimate) (``SAVE_HSML_IN_SNAPSHOT``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| SubfindDMDensity | SFDD | :math:`\text{UnitLength}^{-3}` :math:`\text{UnitMass}` :math:`a^{-3} \, h^2` | dark matter density around particle (SPH like estimate) (``SAVE_HSML_IN_SNAPSHOT``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| SubfindHsml | SFHS | :math:`\text{UnitLength}` :math:`a \, h^{-1}` | SPH smoothing length for density estimate (``SAVE_HSML_IN_SNAPSHOT``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| SubfindVelDisp | SFVD | :math:`\text{UnitVelocity}` | SPH avaraged velocity dispersion around particle (``SAVE_HSML_IN_SNAPSHOT``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| GroupNr | GROU | | Number of nearest group (``FOF_FUZZ_SORT_BY_NEAREST_GROUP=1``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| HighResGasMass | HRGM | :math:`\text{UnitMass}` :math:`h^{-1}` | Conserved scalar quantity flaging the high-res region of a cosmological zoom simulation (``REFINEMENT_HIGH_RES_GAS``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| AllowRefinement | REF | | Is refinement allowed in gas cell. 0 for low-resolution region gas cells in zoom simulations (``REFINEMENT_HIGH_RES_GAS``) |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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Format 1
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--------
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Format 1 is organized in blocks, each holding information about all particles
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for a specific property. The first block is the header, containing global
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informmation about the particle set. Within the other blocks, particles are
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ordered according to their particle type.
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For a more detailed description of this file format, see the GADGET-2 user
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guide (https://wwwmpa.mpa-garching.mpg.de/gadget/users-guide.pdf).
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Format 2
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--------
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Format 2 is a variant of format 1, but containing an additional 4-character
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string at the beginning of each block (called Block ID in table). This way,
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it is possible to read the snapshot without having detailed information about
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all settings that were active in the code that produced this output.
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Format 3 / HDF5
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---------------
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Format 3 is the by now recommended format, based on the hdf5 library.
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The particle data output consists of hdf5 groups called PartTypeX where
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X runs from 0 to NTYPES-1 (NTYPES=6 if not set in Config-file).
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Each of these hdf5 groups has a number of datasets with properties belonging
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to this particular particle type, e.g. ``Coordinates`` for the position of
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particles. These are in general 2d arrays, where the first dimension represents
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the different particles, while the second dimension is the dimensionality of
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the specific property (e.g. for ``Coordinates``, every particle has 3 entries,
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its x, y and z coordinate). Consequently, for scalar quantities, the array is
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just one dimensional.
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In addition to the particle types, each file has an hdf5 group called ``Header``,
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with general information about the simulation and this file in particular.
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These informations are stored in hdf5 attributes within the header group.
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To facilitate the use of the snapshot, the compile time settings are also
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stored in the snapshots, saved as attributes in the group ``Config``, as well as
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the parameter settings in the group ``Parameters``.
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To be sure it is however advisable to check the ``./build/arepoconfig.h`` and the
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``./output/parameters-usedvalues`` files for the compile time and run-time
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variables of a given simulation.
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FOF/Subfind
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===========
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The halo and subhalo finder produces a separate output file, summarizing the
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properties determined by the on the fly analyisis. These run immediately
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before every simulation output, and also sort the particles in the particle
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data output according to group membership, subhalo membership and binding
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energy.
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The (sub)halo output files have two hdf5 groups containing halo data, called
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``Group``, for the properties of groups (identified by the Friend-of-Friends
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algorithm), and ``Subhalo``, for substructures in groups.
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.. table:: **Halo fields in goup catalogue files**
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Group field name | Block ID | Units | Description |
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+=============================+==============+================================================================================================================+=====================================================================================================================================+
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| GroupLen | FLEN | | Number of particles/cells in group |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| GroupMass | FMAS | :math:`\text{UnitMass}` :math:`h^{-1}` | Sum of masses of all particles in group |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| GroupPos | FPOS | :math:`\text{UnitLength}` :math:`a \, h^{-1}` | Position of the most bound particle in group |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| GroupCM | FGCM | :math:`\text{UnitLength}` :math:`a \, h^{-1}` | Position of center of mass of group |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| GroupVel | FVEL | :math:`\text{UnitVelocity}` :math:`a^{-1}` | Velocity of the group, computed as the sum of the mass weighted velocities of all particles/cells in this group, of all types. |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| GroupLenType | FLTY | | Number of particles of given type in group |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| GroupMassType | FMTY | :math:`\text{UnitMass}` :math:`h^{-1}` | Sum of particle masses of given type |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| GroupSFR | FSFR | :math:`\text{Msun}` :math:`\text{yr}^{-1}` | Cumulative star formation rate of all gas cells in group |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Group_M_Mean200 | FMM2 | :math:`\text{UnitMass}` :math:`h^{-1}` | Total mass within a sphere with mean density of 200 times the mean density of the Universe. |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Group_R_Mean200 | FRM2 | :math:`\text{UnitLength}` :math:`a \, h^{-1}` | Radius of sphere corresponding to ``Group_M_Mean200`` |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Group_M_Crit200 | FMC2 | :math:`\text{UnitMass}` :math:`h^{-1}` | Total mass within a sphere around ``GroupPos`` with mean density of 200 times the critical density of the Universe. |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Group_R_Crit200 | FRC2 | :math:`\text{UnitLength}` :math:`a \, h^{-1}` | Radius of sphere corresponding to ``Group_M_Crit200`` |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Group_M_Crit500 | FMC5 | :math:`\text{UnitMass}` :math:`h^{-1}` | Total mass within a sphere around ``GroupPos`` with mean density of 500 times the critical density of the Universe. |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Group_R_Crit500 | FRC5 | :math:`\text{UnitLength}` :math:`a \, h^{-1}` | Radius of sphere corresponding to ``Group_M_Crit500`` |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Group_M_TopHat200 | FMT2 | :math:`\text{UnitMass}` :math:`h^{-1}` | Total mass within a sphere around ``GroupPos`` with mean density having a specific fraction of the mean density of the Universe. |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Group_R_TopHat200 | FRT2 | :math:`\text{UnitLength}` :math:`a \, h^{-1}` | Radius of sphere corresponding to ``Group_M_TopHat200`` |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| GroupNsubs | FNSH | | Number of subhalos identified in this group |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| GroupFirstSub | FFSH | | (Global) index of first subhalo in this group. -1 if there are none. |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| GroupFuzzOffsetType | FUOF | | Particle offset (for each type) of fuzzy particles. |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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.. table:: **Subhalo fields in goup catalogue files**
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| Subhalo field name | Block-ID | Units | Description |
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+=============================+==============+================================================================================================================+=====================================================================================================================================+
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| SubhaloLen | SLEN | | Total number of particles/cells in this subhalo |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| SubhaloMass | SMAS | :math:`\text{UnitMass}` :math:`h^{-1}` | Total mass of all particles in this subhalo, child subhalos not included |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| SubhaloPos | SPOS | :math:`\text{UnitLength}` :math:`a \, h^{-1}` | Position of most bound particle in subhalo |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| SubhaloVel | SVEL | :math:`\text{UnitVelocity}` | Physical velocity of subhalo |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| SubhaloLenType | SLTY | | Number of particle of each type in a subhalo |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| SubhaloMassType | SMTY | :math:`\text{UnitMass}` :math:`h^{-1}` | Mass of each particle type in a subhalo |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| SubhaloCM | SCMP | :math:`\text{UnitLength}` :math:`a \, h^{-1}` | Center of mass of subhalo |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| SubhaloSpin | SSPI | :math:`\text{UnitLength}` :math:`\text{UnitVelocity}` :math:`h^{-1}` | Total spin in each coordinate axis from all subhalo particles/cells |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| SubhaloVelDisp | SVDI | :math:`\text{UnitVelocity}` | 1d velocity dispersion |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| SubhaloVmax | SVMX | :math:`\text{UnitVelocity}` | Maximum circular velocity |
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+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
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| SubhaloVmaxRad | SVRX | :math:`\text{UnitLength}` :math:`a` :math:`h^{-1}` | Radius of maximum circular velocity |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| SubhaloHalfmassRad | SHMR | :math:`\text{UnitLength}` :math:`a` :math:`h^{-1}` | Radius containing half the mass of the subhalo |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| SubhaloHalfmassRadType | SHMT | :math:`\text{UnitLength}` :math:`a` :math:`h^{-1}` | Radius containing half the mass of a given type of particles in the subhalo |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| SubhaloMassInRad | SMIR | :math:`\text{UnitMass}` :math:`h^{-1}` | Sum of all particle masses enclosed in a sphere with twice the part4 (i.e. stellar) half mass radius |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| SubhaloMassInHalfRad | SMIH | :math:`\text{UnitMass}` :math:`h^{-1}` | Sum of all particle masses enclosed in a sphere with the part4 (i.e. stellar) half mass radius |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| SubhaloMassInMaxRad | SMIM | :math:`\text{UnitMass}` :math:`h^{-1}` | Sum of all particle masses enclosed in a sphere with radius ``SubhaloVmaxRad`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| SubhaloMassInRadType | SMIT | :math:`\text{UnitMass}` :math:`h^{-1}` | Sum of particle masses of specific type particles enclosed in a sphere with twice the part4 (i.e. stellar) half mass radius |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| SubhaloMassInHalfRadType | SMHT | :math:`\text{UnitMass}` :math:`h^{-1}` | Sum of particle masses of specific type particles enclosed in a sphere with the part4 (i.e. stellar) half mass radius |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| SubhaloMassInMaxRadType | SMMT | :math:`\text{UnitMass}` :math:`h^{-1}` | Sum of particle masses of specific type particles enclosed in a sphere with radius ``SubhaloVmaxRad`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| SubhaloIDMostbound | SIDM | | The ID of the most bound particle |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| SubhaloGrNr | SGNR | | Global index of the (FoF) group this subhalo belongs to |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| SubhaloParent | SPRT | | Index of a potential parent subhalo this subhalo is part of |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| SubhaloBfldHalo | BFDH | :math:`\text{UnitMass}^{0.5}` :math:`\text{UnitVelocity}` :math:`\text{UnitLength}^{-1.5}` :math:`h \, a^{-2}` | Volume averaged magnetic field strength in subhalo (Gauss unit system, not Heaviside-Lorentz) |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| SubhaloBfldDisk | BFDD | :math:`\text{UnitMass}^{0.5}` :math:`\text{UnitVelocity}` :math:`\text{UnitLength}^{-1.5}` :math:`h \, a^{-2}` | Volume averaged magnetic field strength within twice the stellar half mass radius (Gauss unit system, not Heaviside-Lorentz) |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| SubhaloSFR | SSFR | :math:`\text{Msun} \, \text{yr}^{-1}` | Sum of star formation rates of all gas cells in the subhalo |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| SubhaloSFRinRad | SSFI | :math:`\text{Msun} \, \text{yr}^{-1}` | Sum of star formation rates of all gas cells within twice the stellar half mass radius |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| SubhaloSFRinHalfRad | SSFH | :math:`\text{Msun} \, \text{yr}^{-1}` | Sum of star formation rates of all gas cells within the stellar half mass radius |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| SubhaloSFRinMaxRad | SSFM | :math:`\text{Msun} \, \text{yr}^{-1}` | Sum of star formation rates of all gas cells within a sphere with radius ``SubhaloVmaxRad`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| ID | PIDS | | Particle IDs in subhalo |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
|
|
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|
|
|
|
|
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|
|
|
|
.. table:: **Additional group fields that are calculated when** ``SUBFIND_EXTENDED_PROPERTIES`` **is set**
|
|
|
|
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group field name | Block ID | Units | Description |
|
|
|
|
+=============================+==============+================================================================================================================+=====================================================================================================================================+
|
|
|
|
| Group_J_Mean200 | FJM2 | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of all particles in group within ``Group_R_Mean200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Jdm_Mean200 | JDM2 | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of dark matter particles in group within ``Group_R_Mean200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Jgas_Mean200 | JGM2 | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of gas particles in group withing ``Group_R_Mean200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Jstars_Mean200 | JSM2 | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of star matter particles in group within ``Group_R_Mean200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_MassType_Mean200 | MTM2 | :math:`\text{UnitMass}` :math:`h^{-1}` | Total mass of goup for each particle type within ``Group_R_Mean200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_LenType_Mean200 | LTM2 | | Total number of particles for each particle type within ``Group_R_Mean200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_CMFrac_Mean200 | CFM2 | | Mass fraction of counter-rotating particles within ``Group_R_Mean200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_CMFracType_Mean200 | FTM2 | | Mass fraction of counter-rotating particles within ``Group_R_Mean200`` for each type |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_J_Crit200 | FJC2 | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of all particles in group within ``Group_R_Crit200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Jdm_Crit200 | JDC2 | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of dark matter particles in group within ``Group_R_Crit200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Jgas_Crit200 | JGC2 | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of gas particles in group within ``Group_R_Crit200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Jstars_Crit200 | JSC2 | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of star particles in group within ``Group_R_Crit200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_MassType_Crit200 | MTC2 | :math:`\text{UnitMass}` :math:`h^{-1}` | Total mass of goup for each particle type within ``Group_R_Crit200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_LenType_Crit200 | LTC2 | | Total number of particles for each particle type within ``Group_R_Crit200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_CMFrac_Crit200 | CFC2 | | Mass fraction of counter-rotating particles within ``Group_R_Crit200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_CMFracType_Crit200 | FTC2 | | Mass fraction of counter-rotating particles within ``Group_R_Crit200`` for each type |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_J_Crit500 | FJC5 | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of all particles in group within ``Group_R_Crit500`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Jdm_Crit500 | JDC5 | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of dark matter particles in group within ``Group_R_Crit500`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Jgas_Crit500 | JGC5 | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of gas particles in group within ``Group_R_Crit500`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Jstars_Crit500 | JSC5 | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of star particles in group within ``Group_R_Crit500`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_MassType_Crit500 | MTC5 | :math:`\text{UnitMass}` :math:`h^{-1}` | Total mass of goup for each particle type within ``Group_R_Crit500`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_LenType_Crit500 | LTC5 | | Total number of particles for each particle type within ``Group_R_Crit500`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_CMFrac_Crit500 | CFC5 | | Mass fraction of counter-rotating particles within ``Group_R_Crit500`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_CMFracType_Crit500 | FTC5 | | Mass fraction of counter-rotating particles within ``Group_R_Crit500`` for each type |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_J_TopHat200 | FJT2 | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of all particles in group within ``Group_R_TopHat200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Jdm_TopHat200 | JDT2 | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of dark matter particles in group within ``Group_R_TopHat200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Jgas_TopHat200 | JGT2 | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of gas particles in group within ``Group_R_TopHat200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Jstars_TopHat200 | JST2 | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of star particles in group within ``Group_R_TopHat200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_MassType_TopHat200 | MTT2 | :math:`\text{UnitMass}` :math:`h^{-1}` | Total mass of goup for each particle type within ``Group_R_TopHat200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_LenType_TopHat200 | LTT2 | | Total number of particles for each particle type within ``Group_R_TopHat200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_CMFrac_TopHat200 | CFT2 | | Mass fraction of counter-rotating particles within ``Group_R_TopHat200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_CMFracType_TopHat200 | FTT2 | | Mass fraction of counter-rotating particles within ``Group_R_TopHat200`` for each type |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Epot_Crit200 | EPO1 | :math:`\text{UnitMass}` :math:`\text{UnitVelocity}` :math:`a^{-2} \, h^{-1}` | Total potential energy of particles within ``Group_R_Crit200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Ekin_Crit200 | EKI1 | :math:`\text{UnitMass}` :math:`\text{UnitVelocity}` :math:`a^{-2} \, h^{-1}` | Total kinetic energy of particles within ``Group_R_Crit200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Ethr_Crit200 | ETH1 | :math:`\text{UnitMass}` :math:`\text{UnitVelocity}` :math:`a^{-2} \, h^{-1}` | Total thermal energy of particles within ``Group_R_Crit200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Epot_Mean200 | EPO2 | :math:`\text{UnitMass}` :math:`\text{UnitVelocity}` :math:`a^{-2} \, h^{-1}` | Total potential energy of particles within ``Group_R_Mean200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Ekin_Mean200 | EKI2 | :math:`\text{UnitMass}` :math:`\text{UnitVelocity}` :math:`a^{-2} \, h^{-1}` | Total kinetic energy of particles within ``Group_R_Mean200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Ethr_Mean200 | ETH2 | :math:`\text{UnitMass}` :math:`\text{UnitVelocity}` :math:`a^{-2} \, h^{-1}` | Total thermal energy of particles within ``Group_R_Mean200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Epot_TopHat200 | EPO3 | :math:`\text{UnitMass}` :math:`\text{UnitVelocity}` :math:`a^{-2} \, h^{-1}` | Total potential energy of particles within ``Group_R_TopHat200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Ekin_TopHat200 | EKI3 | :math:`\text{UnitMass}` :math:`\text{UnitVelocity}` :math:`a^{-2} \, h^{-1}` | Total kinetic energy of particles within ``Group_R_TopHat200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Ethr_TopHat200 | ETH3 | :math:`\text{UnitMass}` :math:`\text{UnitVelocity}` :math:`a^{-2} \, h^{-1}` | Total thermal energy of particles within ``Group_R_TopHat200`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Epot_Crit500 | EPO4 | :math:`\text{UnitMass}` :math:`\text{UnitVelocity}` :math:`a^{-2} \, h^{-1}` | Total potential energy of particles within ``Group_R_Crit500`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Ekin_Crit500 | EKI4 | :math:`\text{UnitMass}` :math:`\text{UnitVelocity}` :math:`a^{-2} \, h^{-1}` | Total kinetic energy of particles within ``Group_R_Crit500`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Ethr_Crit500 | ETH4 | :math:`\text{UnitMass}` :math:`\text{UnitVelocity}` :math:`a^{-2} \, h^{-1}` | Total thermal energy of particles within ``Group_R_Crit500`` |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_J | FOFJ | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity} \, h^{-2}` | Total angular momentum of all particles in fof-group |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Jdm | FOJD | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity} \, h^{-2}` | Total angular momentum of all dark matter particles in fof-group |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Jgas | FOJG | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity} h^{-2}` | Total angular momentum of all gas cells in fof-group |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_Jstars | FOJS | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity} \, h^{-2}` | Total angular momentum of all stars in fof-group |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_CMFrac | FOCF | | Mass fraction of counter-rotating particles in fof-group |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Group_CMFracType | FOFT | | Mass fraction of counter-rotating particles in fof-group for each type |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| GroupEkin | EKIN | :math:`\text{UnitMass}` :math:`\text{UnitVelocity}` :math:`a^{-2} \, h^{-1}` | Total kinetic energy of all particles in fof-group |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| GroupEthr | ETHR | :math:`\text{UnitMass}` :math:`\text{UnitVelocity}` :math:`a^{-2} \, h^{-1}` | Total thermal energy of all particles in fof-group |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| GroupEpot | EPOT | :math:`\text{UnitMass}` :math:`\text{UnitVelocity}` :math:`a^{-2} \, h^{-1}` | Total potential energy of all particles in fof-group |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
.. table:: **Additional subhalo fields that are calculated when** ``SUBFIND_EXTENDED_PROPERTIES`` **is set**
|
|
|
|
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Subhalo field name | Block ID | Units | Description |
|
|
|
|
+=============================+==============+================================================================================================================+=====================================================================================================================================+
|
|
|
|
| SubhaloEkin | SEKN | :math:`\text{UnitMass}` :math:`\text{UnitVelocity}` :math:`a^{-2} \, h^{-1}` | Total kinetic energy of all particles in subhalo |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| SubhaloEthr | SETH | :math:`\text{UnitMass}` :math:`\text{UnitVelocity}` :math:`a^{-2} \, h^{-1}` | Total thermal energy of all particles in subhalo |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| SubhaloEpot | SEPT | :math:`\text{UnitMass}` :math:`\text{UnitVelocity}` :math:`a^{-2} \, h^{-1}` | Total potential energy of all particles in subhalo |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Subhalo_J | SUBJ | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelocity}` :math:`h^{-2}` | Total angular momentum of all particles in subhalo |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Subhalo_Jdm | SJDM | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelocity}` :math:`h^{-2}` | Total angular momentum of dark matter particles in subhalo |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Subhalo_Jgas | SJGS | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of gas cells in subhalo |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Subhalo_Jstars | SJST | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of star particles in subhalo |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Subhalo_JInHalfRad | SJHR | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of all particles in stellar half mass radius |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Subhalo_JdmInHalfRad | SJDH | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of dark matter particles withing stellar half mass radius |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Subhalo_JgasInHalfRad | SJGH | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of gas cells within stellar half mass radius |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Subhalo_JstarsInHalfRad | SJSH | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of star particles within stellar half mass radius |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Subhalo_JInRad | SJMR | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of all particles in sphere with radius twice the stellar half mass radius |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Subhalo_JdmInRad | SJDR | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of dark matter particles withing twice the stellar half mass radius |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Subhalo_JgasInRad | SJGR | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of gas cells within twice the stellar half mass radius |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Subhalo_JstarsInRad | SJSR | :math:`\text{UnitMass}` :math:`\text{UnitLength}` :math:`\text{UnitVelcoity}` :math:`h^{-2}` | Total angular momentum of star particles within twice the stellar half mass radius |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Subhalo_CMFrac | SCMF | | Mass fraction of counter-rotating particles in subhalo |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Subhalo_CMFracType | SCMT | | Mass fraction of counter-rotating particles in subhalo for each type |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Subhalo_CMFracInHalfRad | SCMH | | Mass fraction of counter-rotating particles within stellar half mass radius |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Subhalo_CMFracTypeInHalfRad | SCTH | | Mass fraction of counter-rotating particles within stellar half mass radius for each type |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Subhalo_CMFracInRad | SCMR | | Mass fraction of counter-rotating particles in a sphere with twice the stellar half mass radius |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
| Subhalo_CMFracTypeInRad | SCTR | | Mass fraction of counter-rotating particles in a sphere with twice the stellar half mass radius for each type |
|
|
|
|
+-----------------------------+--------------+----------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
|
|
|
|
|
