Plot type:
Histogram bins the data by a single field and displays count of objects per bin.
Heatmap bins the data by two fields and displays count as color.
Conditional distribution bins the data by one field and displays the distribution of a second field within that bin as a boxplot (range and quartiles).
Shows a scatterplot of a (random subset) of actual data points.

For log functionality, set the filter to enable only positive values.

For log functionality, set the filter to enable only positive values.

For log functionality, set the filter to enable only positive values.

Count:
Choose whether the object count per bin is shown in linear or log scale.
Count is shown on the Y axis.
Count is shown on the color (Z) axis.

Use "*" as wildcard

Examples:{{ bucket.key }}

Range:

{{filter.render(filter.aggs.min)}}

{{filter.render(filter.aggs.max)}}

Select field to filter

Example python code to apply the above filters and retrieve data. To use, download and install this module.

Field | Variable | Type | Units | Description |
---|---|---|---|---|

simulation | simulation | byte | e.g. 'Illustris-1' or 'Illustris-2-Dark'. | |

snap | snapshot | short | snapshot number | |

time | time | float | Scalefactor of the snapshot corresponding to this group catalog. | |

z | redshift | float | Redshift of the snapshot corresponding to this group catalog. | |

type | type | boolean | ||

id | id | integer | Group index number | |

Group | float | FoF halos | ||

BHMass | Group_BHMass | float | \(10^{10}M_\odot/h\) | Sum of the BH_Mass field of all blackholes (type 5) in this group. |

\(\dot{M}_{\rm BH}\) | Group_BHMdot | float | \((10^{10}M_\odot/h)/(0.978Gyr/h)\) | Sum of the BH_Mdot field of all blackholes (type 5) in this group. |

CM | float | ckpc/h | Center of mass of the group, computed as the sum of the mass weighted relative coordinates of all particles/cells in the group, of all types. Comoving coordinate. (Available only for the Illustris-3 run) | |

\({\rm CM}_x\) | Group_CM_x | float | ckpc/h | |

\({\rm CM}_y\) | Group_CM_y | float | ckpc/h | |

\({\rm CM}_z\) | Group_CM_z | float | ckpc/h | |

FirstSub | Group_FirstSub | integer | Index into the Subhalo table of the first/primary/most massive Subfind group within this FoF group. Note: This value is signed (or should be interpreted as signed)! In this case, a value of -1 indicates that this FoF group has no subhalos. | |

GasMetallicity | Group_GasMetallicity | float | Mass-weighted average metallicity (Mz/Mtot, where Z = any element above He) of all gas cells in this FOF group. | |

\(N_{\rm part}\) | Group_Len | integer | Integer counter of the total number of particles/cells of all types in this group. | |

LenType | integer | Integer counter of the total number of particles/cells, split into the six different types, in this group. Note: Wind phase cells are counted as stars (type 4) for GroupLenType. | ||

\(N_{\rm gas}\) | Group_LenType_gas | integer | ||

\(N_{\rm DM}\) | Group_LenType_dm | integer | ||

unused | Group_LenType_unused | integer | ||

tracers | Group_LenType_tracers | integer | ||

\(N_{\rm stars}\) | Group_LenType_stars | integer | ||

\(N_{\rm BH}\) | Group_LenType_bh | integer | ||

\(M_{\rm tot}\) | Group_Mass | float | \(10^{10}M_\odot/h\) | Sum of the individual masses of every particle/cell, of all types, in this group. |

MassType | float | \(10^{10}M_\odot/h\) | Sum of the individual masses of every particle/cell, split into the six different types, in this group. Note: Wind phase cells are counted as gas (type 0) for GroupMassType. | |

\(M_{\rm gas}\) | Group_MassType_gas | float | \(10^{10}M_\odot/h\) | |

\(M_{\rm DM}\) | Group_MassType_dm | float | \(10^{10}M_\odot/h\) | |

unused | Group_MassType_unused | float | \(10^{10}M_\odot/h\) | |

tracers | Group_MassType_tracers | float | \(10^{10}M_\odot/h\) | |

\(M_{\star}\) | Group_MassType_stars | float | \(10^{10}M_\odot/h\) | |

\(M_{\rm BH}\) | Group_MassType_bh | float | \(10^{10}M_\odot/h\) | |

Nsubs | Group_Nsubs | integer | Count of the total number of Subfind groups within this FoF group. | |

Pos | float | ckpc/h | Spatial position within the periodic box of the maximum bound particle. Comoving coordinate. | |

x | Group_Pos_x | float | ckpc/h | |

y | Group_Pos_y | float | ckpc/h | |

z | Group_Pos_z | float | ckpc/h | |

SFR | Group_SFR | float | \(M_\odot/yr\) | Sum of the individual star formation rates of all gas cells in this group. |

StarMetallicity | Group_StarMetallicity | float | Mass-weighted average metallicity (Mz/Mtot, where Z = any element above He) of all star particles in this FOF group. | |

vel | float | km/s/a | Velocity of the group, computed as the sum of the mass weighted velocities of all particles/cells in this group, of all types. The peculiar velocity is obtained by multiplying this value by \(1/a.\) | |

\(v_x\) | Group_Vel_x | float | km/s/a | |

\(v_y\) | Group_Vel_y | float | km/s/a | |

\(v_z\) | Group_Vel_z | float | km/s/a | |

WindMass | Group_WindMass | float | \(10^{10}M_\odot/h\) | Sum of the individual masses of all wind phase gas cells (type 4, BirthTime <= 0) in this group. |

M_Crit200 | Group_M_Crit200 | float | \(10^{10}M_\odot/h\) | Total Mass of this group enclosed in a sphere whose mean density is 200 times the critical density of the Universe, at the time the halo is considered. |

M_Crit500 | Group_M_Crit500 | float | \(10^{10}M_\odot/h\) | Total Mass of this group enclosed in a sphere whose mean density is 500 times the critical density of the Universe, at the time the halo is considered. |

M_Mean200 | Group_M_Mean200 | float | \(10^{10}M_\odot/h\) | Total Mass of this group enclosed in a sphere whose mean density is 200 times the mean density of the Universe, at the time the halo is considered. |

M_TopHat200 | Group_M_TopHat200 | float | \(10^{10}M_\odot/h\) | Total Mass of this group enclosed in a sphere whose mean density is \(\Delta_c\) times the critical density of the Universe, at the time the halo is considered. \(\Delta_c\) derives from the solution of the collapse of a spherical top-hat perturbation (fitting formula from Bryan+ 1998, http://adsabs.harvard.edu/abs/1998ApJ...495...80B). The subscript 200 can be ignored. |

R_Crit200 | Group_R_Crit200 | float | ckpc/h | Comoving Radius of a sphere centered at the GroupPos of this Group whose mean density is 200 times the critical density of the Universe, at the time the halo is considered. |

R_Crit500 | Group_R_Crit500 | float | ckpc/h | Comoving Radius of a sphere centered at the GroupPos of this Group whose mean density is 500 times the critical density of the Universe, at the time the halo is considered. |

R_Mean200 | Group_R_Mean200 | float | ckpc/h | Comoving Radius of a sphere centered at the GroupPos of this Group whose mean density is 200 times the mean density of the Universe, at the time the halo is considered. |

R_TopHat200 | Group_R_TopHat200 | float | ckpc/h | Comoving Radius of a sphere centered at the GroupPos of this Group whose mean density is \(\Delta_c\) times the critical density of the Universe, at the time the halo is considered. |

SnapByType | long | |||

gas | Group_SnapByType_gas | long | ||

dm | Group_SnapByType_dm | long | ||

unused | Group_SnapByType_unused | long | ||

tracers | Group_SnapByType_tracers | long | ||

stars | Group_SnapByType_stars | long | ||

bh | Group_SnapByType_bh | long | ||

FuzzByType | long | |||

gas | Group_FuzzByType_gas | long | ||

dm | Group_FuzzByType_dm | long | ||

unused | Group_FuzzByType_unused | long | ||

tracers | Group_FuzzByType_tracers | long | ||

stars | Group_FuzzByType_stars | long | ||

bh | Group_FuzzByType_bh | long | ||

Subhalo | float | Subfind Subhalos | ||

id | Subhalo_id | integer | Subgroup index number | |

BHMass | Subhalo_BHMass | float | \(10^{10}M_\odot/h\) | Sum of the masses of all blackholes in this subhalo. |

BHMdot | Subhalo_BHMdot | float | \((10^{10}M_\odot/h)/(0.978Gyr/h)\) | Sum of the instantaneous accretion rates \(\dot{M}\) of all blackholes in this subhalo. |

CM | float | ckpc/h | Comoving center of mass of the Subhalo, computed as the sum of the mass weighted relative coordinates of all particles/cells in the Subhalo, of all types. | |

x | Subhalo_CM_x | float | ckpc/h | |

y | Subhalo_CM_y | float | ckpc/h | |

z | Subhalo_CM_z | float | ckpc/h | |

GasMetallicity | Subhalo_GasMetallicity | float | Mass-weighted average metallicity (Mz/Mtot, where Z = any element above He) of the gas cells bound to this Subhalo, but restricted to cells within twice the stellar half mass radius. | |

GasMetallicityHalfRad | Subhalo_GasMetallicityHalfRad | float | Same as SubhaloGasMetallicity, but restricted to cells within the stellar half mass radius. | |

GasMetallicityMaxRad | Subhalo_GasMetallicityMaxRad | float | Same as SubhaloGasMetallicity, but restricted to cells within the radius of \(V_{max}\). | |

GasMetallicitySfr | Subhalo_GasMetallicitySfr | float | Mass-weighted average metallicity (Mz/Mtot, where Z = any element above He) of the gas cells bound to this Subhalo, but restricted to cells which are star forming. | |

GasMetallicitySfrWeighted | Subhalo_GasMetallicitySfrWeighted | float | Same as SubhaloGasMetallicitySfr, but weighted by the cell star-formation rate rather than the cell mass. | |

GrNr | Subhalo_GrNr | integer | Index into the Group table of the FOF host/parent of this Subhalo. | |

HalfmassRad | Subhalo_HalfmassRad | float | ckpc/h | Comoving radius containing half of the total mass (SubhaloMass) of this Subhalo. |

HalfmassRadType | float | ckpc/h | Comoving radius containing half of the mass of this Subhalo split by Type (SubhaloMassType). | |

gas | Subhalo_HalfmassRadType_gas | float | ckpc/h | |

dm | Subhalo_HalfmassRadType_dm | float | ckpc/h | |

unused | Subhalo_HalfmassRadType_unused | float | ckpc/h | |

tracers | Subhalo_HalfmassRadType_tracers | float | ckpc/h | |

stars | Subhalo_HalfmassRadType_stars | float | ckpc/h | |

bh | Subhalo_HalfmassRadType_bh | float | ckpc/h | |

IDMostbound | Subhalo_IDMostbound | long | The ID of the particle with the smallest binding energy (could be any type). | |

Len | Subhalo_Len | integer | Total number of member particle/cells in this Subhalo, of all types. | |

LenType | integer | Total number of member particle/cells in this Subhalo, separated by type. | ||

gas | Subhalo_LenType_gas | integer | ||

dm | Subhalo_LenType_dm | integer | ||

unused | Subhalo_LenType_unused | integer | ||

tracers | Subhalo_LenType_tracers | integer | ||

stars | Subhalo_LenType_stars | integer | ||

bh | Subhalo_LenType_bh | integer | ||

Mass | Subhalo_Mass | float | \(10^{10}M_\odot/h\) | Total mass of all member particle/cells which are bound to this Subhalo, of all types. Particle/cells bound to subhaloes of this Subhalo are NOT accounted for. |

MassInHalfRad | Subhalo_MassInHalfRad | float | \(10^{10}M_\odot/h\) | Sum of masses of all particles/cells within the stellar half mass radius. |

MassInHalfRadType | float | \(10^{10}M_\odot/h\) | Sum of masses of all particles/cells (split by type) within the stellar half mass radius. | |

gas | Subhalo_MassInHalfRadType_gas | float | \(10^{10}M_\odot/h\) | |

dm | Subhalo_MassInHalfRadType_dm | float | \(10^{10}M_\odot/h\) | |

unused | Subhalo_MassInHalfRadType_unused | float | \(10^{10}M_\odot/h\) | |

tracers | Subhalo_MassInHalfRadType_tracers | float | \(10^{10}M_\odot/h\) | |

stars | Subhalo_MassInHalfRadType_stars | float | \(10^{10}M_\odot/h\) | |

bh | Subhalo_MassInHalfRadType_bh | float | \(10^{10}M_\odot/h\) | |

MassInMaxRad | Subhalo_MassInMaxRad | float | \(10^{10}M_\odot/h\) | Sum of masses of all particles/cells within the radius of \(V_{max}\). |

MassInMaxRadType | float | \(10^{10}M_\odot/h\) | Sum of masses of all particles/cells (split by type) within the radius of \(V_{max}\). | |

gas | Subhalo_MassInMaxRadType_gas | float | \(10^{10}M_\odot/h\) | |

dm | Subhalo_MassInMaxRadType_dm | float | \(10^{10}M_\odot/h\) | |

unused | Subhalo_MassInMaxRadType_unused | float | \(10^{10}M_\odot/h\) | |

tracers | Subhalo_MassInMaxRadType_tracers | float | \(10^{10}M_\odot/h\) | |

stars | Subhalo_MassInMaxRadType_stars | float | \(10^{10}M_\odot/h\) | |

bh | Subhalo_MassInMaxRadType_bh | float | \(10^{10}M_\odot/h\) | |

MassInRad | Subhalo_MassInRad | float | \(10^{10}M_\odot/h\) | Sum of masses of all particles/cells within twice the stellar half mass radius. |

MassInRadType | float | \(10^{10}M_\odot/h\) | Sum of masses of all particles/cells (split by type) within twice the stellar half mass radius. | |

gas | Subhalo_MassInRadType_gas | float | \(10^{10}M_\odot/h\) | |

dm | Subhalo_MassInRadType_dm | float | \(10^{10}M_\odot/h\) | |

unused | Subhalo_MassInRadType_unused | float | \(10^{10}M_\odot/h\) | |

tracers | Subhalo_MassInRadType_tracers | float | \(10^{10}M_\odot/h\) | |

stars | Subhalo_MassInRadType_stars | float | \(10^{10}M_\odot/h\) | |

bh | Subhalo_MassInRadType_bh | float | \(10^{10}M_\odot/h\) | |

MassType | float | \(10^{10}M_\odot/h\) | Total mass of all member particle/cells which are bound to this Subhalo, separated by type. Particle/cells bound to subhaloes of this Subhalo are NOT accounted for. Note: Wind phase cells are counted as gas (type 0) for SubhaloMassType. | |

gas | Subhalo_MassType_gas | float | \(10^{10}M_\odot/h\) | |

dm | Subhalo_MassType_dm | float | \(10^{10}M_\odot/h\) | |

unused | Subhalo_MassType_unused | float | \(10^{10}M_\odot/h\) | |

tracers | Subhalo_MassType_tracers | float | \(10^{10}M_\odot/h\) | |

stars | Subhalo_MassType_stars | float | \(10^{10}M_\odot/h\) | |

bh | Subhalo_MassType_bh | float | \(10^{10}M_\odot/h\) | |

Parent | Subhalo_Parent | integer | Index into the Subhalo table of the unique SUBF host/parent of this Subhalo. This index is local to the group (i.e. 2 indicates the third most massive subhalo of the parent halo of this subhalo, not the third most massive of the whole snapshot). The values are often zero for all subhalos of a group, indicating that there is no resolved hierarchical structure in that group, beyond the primary subhalo having as direct children all of the secondary subhalos. | |

Pos | float | ckpc/h | Spatial position within the periodic box of the maximum bound particle. Comoving coordinate. | |

x | Subhalo_Pos_x | float | ckpc/h | |

y | Subhalo_Pos_y | float | ckpc/h | |

z | Subhalo_Pos_z | float | ckpc/h | |

SFR | Subhalo_SFR | float | \(M_\odot/yr\) | Sum of the individual star formation rates of all gas cells in this subhalo. |

SFRinHalfRad | Subhalo_SFRinHalfRad | float | \(M_\odot/yr\) | Same as SubhaloSFR, but restricted to cells within the stellar half mass radius. |

SFRinMaxRad | Subhalo_SFRinMaxRad | float | \(M_\odot/yr\) | Same as SubhaloSFR, but restricted to cells within the radius of \(V_{max}\). |

SFRinRad | Subhalo_SFRinRad | float | \(M_\odot/yr\) | Same as SubhaloSFR, but restricted to cells within twice the stellar half mass radius. |

Spin | float | \((kpc/h)(km/s)\) | Total spin per axis, computed for each as the mass weighted sum of the relative coordinate times relative velocity of all member particles/cells. | |

x | Subhalo_Spin_x | float | \((kpc/h)(km/s)\) | |

y | Subhalo_Spin_y | float | \((kpc/h)(km/s)\) | |

z | Subhalo_Spin_z | float | \((kpc/h)(km/s)\) | |

StarMetallicity | Subhalo_StarMetallicity | float | - | Mass-weighted average metallicity (Mz/Mtot, where Z = any element above He) of the star particles bound to this Subhalo, but restricted to stars within twice the stellar half mass radius. |

StarMetallicityHalfRad | Subhalo_StarMetallicityHalfRad | float | Same as SubhaloStarMetallicity, but restricted to stars within the stellar half mass radius. | |

StarMetallicityMaxRad | Subhalo_StarMetallicityMaxRad | float | - | Same as SubhaloStarMetallicity, but restricted to stars within the radius of \(V_{max}\). |

StellarPhotometrics | float | mag | Eight bands: U, B, V, K, g, r, i, z. Magnitudes based on the summed-up luminosities of all the stellar particles of the group. For details on the bands, see snapshot table for stars. | |

U | Subhalo_StellarPhotometrics_U | float | mag | |

B | Subhalo_StellarPhotometrics_B | float | mag | |

V | Subhalo_StellarPhotometrics_V | float | mag | |

K | Subhalo_StellarPhotometrics_K | float | mag | |

g | Subhalo_StellarPhotometrics_g | float | mag | |

r | Subhalo_StellarPhotometrics_r | float | mag | |

i | Subhalo_StellarPhotometrics_i | float | mag | |

z | Subhalo_StellarPhotometrics_z | float | mag | |

StellarPhotometricsMassInRad | Subhalo_StellarPhotometricsMassInRad | float | \(10^{10}M_\odot/h\) | Sum of the mass of the member stellar particles, but restricted to stars within the radius SubhaloStellarPhotometricsRad. |

StellarPhotometricsRad | Subhalo_StellarPhotometricsRad | float | ckpc/h | Radius at which the surface brightness profile (computed from all member stellar particles) drops below the limit of 20.7 mag arcsec\(^{-2}\) in the K band (in comoving units). |

Vel | float | km/s | Peculiar velocity of the group, computed as the sum of the mass weighted velocities of all particles/cells in this group, of all types. No unit conversion is needed. | |

x | Subhalo_Vel_x | float | km/s | |

y | Subhalo_Vel_y | float | km/s | |

z | Subhalo_Vel_z | float | km/s | |

VelDisp | Subhalo_VelDisp | float | km/s | One-dimensional velocity dispersion of all the member particles/cells (the 3D dispersion divided by \(\sqrt{3}\)). |

Vmax | Subhalo_Vmax | float | km/s | Maximum value of the spherically-averaged rotation curve. |

VmaxRad | Subhalo_VmaxRad | float | kpc/h | Comoving radius of rotation curve maximum (where \(V_{max}\) is achieved). |

WindMass | Subhalo_WindMass | float | \(10^{10}M_\odot/h\) | Sum of masses of all wind-phase cells in this subhalo (with Type==4 and BirthTime<=0). |

SnapByType | long | |||

gas | Subhalo_SnapByType_gas | long | ||

dm | Subhalo_SnapByType_dm | long | ||

unused | Subhalo_SnapByType_unused | long | ||

tracers | Subhalo_SnapByType_tracers | long | ||

stars | Subhalo_SnapByType_stars | long | ||

bh | Subhalo_SnapByType_bh | long | ||

HalfMassProjRad_DM | Subhalo_HalfMassProjRad_DM | float | pkpc | Projected physical radius enclosing half of the dark matter mass (averaged over three orthogonal projections). |

Gas_Spin | float | pkpc km s-1 | Total angular momentum per unit mass of all gas relative to the CentreOfMass. | |

x | Subhalo_Gas_Spin_x | float | pkpc km s-1 | |

y | Subhalo_Gas_Spin_y | float | pkpc km s-1 | |

z | Subhalo_Gas_Spin_z | float | pkpc km s-1 | |

HalfMassProjRad | float | pkpc | Projected physical radius enclosing half of the mass (averaged over three orthogonal projections). | |

BH | Subhalo_HalfMassProjRad_BH | float | pkpc | Projected physical radius enclosing half of the black hole mass (averaged over three orthogonal projections). This is constructed from the particle masses and not from the subgrid masses. |

Gas | Subhalo_HalfMassProjRad_Gas | float | pkpc | Projected physical radius enclosing half of the gas mass (averaged over three orthogonal projections). |

Star | Subhalo_HalfMassProjRad_Star | float | pkpc | Projected physical radius enclosing half of the stellar mass (averaged over three orthogonal projections). |

InitialMassWeightedBirthZ | Subhalo_InitialMassWeightedBirthZ | float | z | Mean redshift of formation of stars, weighted by birth mass. |

InitialMassWeightedStellarAge | Subhalo_InitialMassWeightedStellarAge | float | Gyr | Mean age of stars, weighted by birth mass. |

Stars_Spin | float | pkpc km s-1 | Total angular momentum per unit mass relative to the CentreOfMass. | |

x | Subhalo_Stars_Spin_x | float | pkpc km s-1 | |

y | Subhalo_Stars_Spin_y | float | pkpc km s-1 | |

z | Subhalo_Stars_Spin_z | float | pkpc km s-1 | |

StellarInitialMass | Subhalo_StellarInitialMass | float | Msun | Sum of birth masses of all stars. |

StellarVelDisp | Subhalo_StellarVelDisp | float | km s-1 | Average one dimensional velocity dispersion of stars. |

ThermalEnergy | Subhalo_ThermalEnergy | float | Msun (km/s)2 | Total thermal energy of the gas particles. |

Aperture | float | Measurements within a given aperture from the center of potential, available aperture sizes are: 1, 3, 5, 10, 20, 30, 40, 50, 70 and 100 pkpc. | ||

Mass_BH | float | Msun | Total (particle) mass of all black holes within the aperture. | |

1 | Subhalo_Aperture_Mass_BH_1 | float | Msun | |

3 | Subhalo_Aperture_Mass_BH_3 | float | Msun | |

5 | Subhalo_Aperture_Mass_BH_5 | float | Msun | |

10 | Subhalo_Aperture_Mass_BH_10 | float | Msun | |

20 | Subhalo_Aperture_Mass_BH_20 | float | Msun | |

30 | Subhalo_Aperture_Mass_BH_30 | float | Msun | |

40 | Subhalo_Aperture_Mass_BH_40 | float | Msun | |

50 | Subhalo_Aperture_Mass_BH_50 | float | Msun | |

70 | Subhalo_Aperture_Mass_BH_70 | float | Msun | |

100 | Subhalo_Aperture_Mass_BH_100 | float | Msun | |

Mass_DM | float | Msun | Total dark matter mass within the aperture. | |

1 | Subhalo_Aperture_Mass_DM_1 | float | Msun | |

3 | Subhalo_Aperture_Mass_DM_3 | float | Msun | |

5 | Subhalo_Aperture_Mass_DM_5 | float | Msun | |

10 | Subhalo_Aperture_Mass_DM_10 | float | Msun | |

20 | Subhalo_Aperture_Mass_DM_20 | float | Msun | |

30 | Subhalo_Aperture_Mass_DM_30 | float | Msun | |

40 | Subhalo_Aperture_Mass_DM_40 | float | Msun | |

50 | Subhalo_Aperture_Mass_DM_50 | float | Msun | |

70 | Subhalo_Aperture_Mass_DM_70 | float | Msun | |

100 | Subhalo_Aperture_Mass_DM_100 | float | Msun | |

Mass_Gas | float | Msun | Total gas mass within the aperture. | |

1 | Subhalo_Aperture_Mass_Gas_1 | float | Msun | |

3 | Subhalo_Aperture_Mass_Gas_3 | float | Msun | |

5 | Subhalo_Aperture_Mass_Gas_5 | float | Msun | |

10 | Subhalo_Aperture_Mass_Gas_10 | float | Msun | |

20 | Subhalo_Aperture_Mass_Gas_20 | float | Msun | |

30 | Subhalo_Aperture_Mass_Gas_30 | float | Msun | |

40 | Subhalo_Aperture_Mass_Gas_40 | float | Msun | |

50 | Subhalo_Aperture_Mass_Gas_50 | float | Msun | |

70 | Subhalo_Aperture_Mass_Gas_70 | float | Msun | |

100 | Subhalo_Aperture_Mass_Gas_100 | float | Msun | |

Mass_Star | float | Msun | Total stellar mass within the aperture. | |

1 | Subhalo_Aperture_Mass_Star_1 | float | Msun | |

3 | Subhalo_Aperture_Mass_Star_3 | float | Msun | |

5 | Subhalo_Aperture_Mass_Star_5 | float | Msun | |

10 | Subhalo_Aperture_Mass_Star_10 | float | Msun | |

20 | Subhalo_Aperture_Mass_Star_20 | float | Msun | |

30 | Subhalo_Aperture_Mass_Star_30 | float | Msun | |

40 | Subhalo_Aperture_Mass_Star_40 | float | Msun | |

50 | Subhalo_Aperture_Mass_Star_50 | float | Msun | |

70 | Subhalo_Aperture_Mass_Star_70 | float | Msun | |

100 | Subhalo_Aperture_Mass_Star_100 | float | Msun | |

SFR | float | yr-1 | Star formation rate within the aperture. | |

1 | Subhalo_Aperture_SFR_1 | float | yr-1 | |

3 | Subhalo_Aperture_SFR_3 | float | yr-1 | |

5 | Subhalo_Aperture_SFR_5 | float | yr-1 | |

10 | Subhalo_Aperture_SFR_10 | float | yr-1 | |

20 | Subhalo_Aperture_SFR_20 | float | yr-1 | |

30 | Subhalo_Aperture_SFR_30 | float | yr-1 | |

40 | Subhalo_Aperture_SFR_40 | float | yr-1 | |

50 | Subhalo_Aperture_SFR_50 | float | yr-1 | |

70 | Subhalo_Aperture_SFR_70 | float | yr-1 | |

100 | Subhalo_Aperture_SFR_100 | float | yr-1 | |

VelDisp | float | km s-1 | Stellar velocity dispersion within the aperture, with respect to the centre of mass of the galaxy. | |

1 | Subhalo_Aperture_VelDisp_1 | float | km s-1 | |

3 | Subhalo_Aperture_VelDisp_3 | float | km s-1 | |

5 | Subhalo_Aperture_VelDisp_5 | float | km s-1 | |

10 | Subhalo_Aperture_VelDisp_10 | float | km s-1 | |

20 | Subhalo_Aperture_VelDisp_20 | float | km s-1 | |

30 | Subhalo_Aperture_VelDisp_30 | float | km s-1 | |

40 | Subhalo_Aperture_VelDisp_40 | float | km s-1 | |

50 | Subhalo_Aperture_VelDisp_50 | float | km s-1 | |

70 | Subhalo_Aperture_VelDisp_70 | float | km s-1 | |

100 | Subhalo_Aperture_VelDisp_100 | float | km s-1 | |

Sizes | float | |||

R_halfmass100 | Subhalo_Sizes_R_halfmass100 | float | pkpc | Half mass radius computed for mass within a spherical 100 pkpc aperture. |

R_halfmass100_projected | Subhalo_Sizes_R_halfmass100_projected | float | pkpc | Projected half mass radius computed for mass within a 100 pkpc aperture (averaged over three orthogonal projections). |

R_halfmass30 | Subhalo_Sizes_R_halfmass30 | float | pkpc | Half mass radius computed for mass within a spherical 30 pkpc aperture. |

R_halfmass30_projected | Subhalo_Sizes_R_halfmass30_projected | float | pkpc | Projected half mass radius computed for mass within a 30 pkpc aperture (averaged over three orthogonal projections). |

Illustris FoF Halo catalog derived with a standard friends-of-friends (FoF) algorithm. Any publication using these data should cite Vogelsberger+ (2014) and Nelson+ (2015).

More under:

simulation e.g. 'Illustris-1' or 'Illustris-2-Dark'. | snap snapshot number | time Scalefactor of the snapshot corresponding to this group catalog. | z Redshift of the snapshot corresponding to this group catalog. | type | id Group index number | Group FoF halos | Subhalo Subfind Subhalos | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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BHMass
\(10^{10}M_\odot/h\) Sum of the BH_Mass field of all blackholes (type 5) in this group. |
\(\dot{M}_{\rm BH}\)
\((10^{10}M_\odot/h)/(0.978Gyr/h)\) Sum of the BH_Mdot field of all blackholes (type 5) in this group. |
CM ckpc/h Center of mass of the group, computed as the sum of the mass weighted relative coordinates of all particles/cells in the group, of all types. Comoving coordinate. (Available only for the Illustris-3 run) | FirstSub Index into the Subhalo table of the first/primary/most massive Subfind group within this FoF group. Note: This value is signed (or should be interpreted as signed)! In this case, a value of -1 indicates that this FoF group has no subhalos. | GasMetallicity Mass-weighted average metallicity (Mz/Mtot, where Z = any element above He) of all gas cells in this FOF group. | \(N_{\rm part}\) Integer counter of the total number of particles/cells of all types in this group. | LenType Integer counter of the total number of particles/cells, split into the six different types, in this group. Note: Wind phase cells are counted as stars (type 4) for GroupLenType. |
\(M_{\rm tot}\)
\(10^{10}M_\odot/h\) Sum of the individual masses of every particle/cell, of all types, in this group. |
MassType \(10^{10}M_\odot/h\) Sum of the individual masses of every particle/cell, split into the six different types, in this group. Note: Wind phase cells are counted as gas (type 0) for GroupMassType. | Nsubs Count of the total number of Subfind groups within this FoF group. | Pos ckpc/h Spatial position within the periodic box of the maximum bound particle. Comoving coordinate. |
SFR
\(M_\odot/yr\) Sum of the individual star formation rates of all gas cells in this group. |
StarMetallicity Mass-weighted average metallicity (Mz/Mtot, where Z = any element above He) of all star particles in this FOF group. | vel km/s/a Velocity of the group, computed as the sum of the mass weighted velocities of all particles/cells in this group, of all types. The peculiar velocity is obtained by multiplying this value by \(1/a.\) |
WindMass
\(10^{10}M_\odot/h\) Sum of the individual masses of all wind phase gas cells (type 4, BirthTime <= 0) in this group. |
M_Crit200
\(10^{10}M_\odot/h\) Total Mass of this group enclosed in a sphere whose mean density is 200 times the critical density of the Universe, at the time the halo is considered. |
M_Crit500
\(10^{10}M_\odot/h\) Total Mass of this group enclosed in a sphere whose mean density is 500 times the critical density of the Universe, at the time the halo is considered. |
M_Mean200
\(10^{10}M_\odot/h\) Total Mass of this group enclosed in a sphere whose mean density is 200 times the mean density of the Universe, at the time the halo is considered. |
M_TopHat200
\(10^{10}M_\odot/h\) Total Mass of this group enclosed in a sphere whose mean density is \(\Delta_c\) times the critical density of the Universe, at the time the halo is considered. \(\Delta_c\) derives from the solution of the collapse of a spherical top-hat perturbation (fitting formula from Bryan+ 1998, http://adsabs.harvard.edu/abs/1998ApJ...495...80B). The subscript 200 can be ignored. |
R_Crit200
ckpc/h Comoving Radius of a sphere centered at the GroupPos of this Group whose mean density is 200 times the critical density of the Universe, at the time the halo is considered. |
R_Crit500
ckpc/h Comoving Radius of a sphere centered at the GroupPos of this Group whose mean density is 500 times the critical density of the Universe, at the time the halo is considered. |
R_Mean200
ckpc/h Comoving Radius of a sphere centered at the GroupPos of this Group whose mean density is 200 times the mean density of the Universe, at the time the halo is considered. |
R_TopHat200
ckpc/h Comoving Radius of a sphere centered at the GroupPos of this Group whose mean density is \(\Delta_c\) times the critical density of the Universe, at the time the halo is considered. |
SnapByType | FuzzByType | id Subgroup index number |
BHMass
\(10^{10}M_\odot/h\) Sum of the masses of all blackholes in this subhalo. |
BHMdot
\((10^{10}M_\odot/h)/(0.978Gyr/h)\) Sum of the instantaneous accretion rates \(\dot{M}\) of all blackholes in this subhalo. |
CM ckpc/h Comoving center of mass of the Subhalo, computed as the sum of the mass weighted relative coordinates of all particles/cells in the Subhalo, of all types. | GasMetallicity Mass-weighted average metallicity (Mz/Mtot, where Z = any element above He) of the gas cells bound to this Subhalo, but restricted to cells within twice the stellar half mass radius. | GasMetallicityHalfRad Same as SubhaloGasMetallicity, but restricted to cells within the stellar half mass radius. | GasMetallicityMaxRad Same as SubhaloGasMetallicity, but restricted to cells within the radius of \(V_{max}\). | GasMetallicitySfr Mass-weighted average metallicity (Mz/Mtot, where Z = any element above He) of the gas cells bound to this Subhalo, but restricted to cells which are star forming. | GasMetallicitySfrWeighted Same as SubhaloGasMetallicitySfr, but weighted by the cell star-formation rate rather than the cell mass. | GrNr Index into the Group table of the FOF host/parent of this Subhalo. |
HalfmassRad
ckpc/h Comoving radius containing half of the total mass (SubhaloMass) of this Subhalo. |
HalfmassRadType ckpc/h Comoving radius containing half of the mass of this Subhalo split by Type (SubhaloMassType). | IDMostbound The ID of the particle with the smallest binding energy (could be any type). | Len Total number of member particle/cells in this Subhalo, of all types. | LenType Total number of member particle/cells in this Subhalo, separated by type. |
Mass
\(10^{10}M_\odot/h\) Total mass of all member particle/cells which are bound to this Subhalo, of all types. Particle/cells bound to subhaloes of this Subhalo are NOT accounted for. |
MassInHalfRad
\(10^{10}M_\odot/h\) Sum of masses of all particles/cells within the stellar half mass radius. |
MassInHalfRadType \(10^{10}M_\odot/h\) Sum of masses of all particles/cells (split by type) within the stellar half mass radius. |
MassInMaxRad
\(10^{10}M_\odot/h\) Sum of masses of all particles/cells within the radius of \(V_{max}\). |
MassInMaxRadType \(10^{10}M_\odot/h\) Sum of masses of all particles/cells (split by type) within the radius of \(V_{max}\). |
MassInRad
\(10^{10}M_\odot/h\) Sum of masses of all particles/cells within twice the stellar half mass radius. |
MassInRadType \(10^{10}M_\odot/h\) Sum of masses of all particles/cells (split by type) within twice the stellar half mass radius. | MassType \(10^{10}M_\odot/h\) Total mass of all member particle/cells which are bound to this Subhalo, separated by type. Particle/cells bound to subhaloes of this Subhalo are NOT accounted for. Note: Wind phase cells are counted as gas (type 0) for SubhaloMassType. | Parent Index into the Subhalo table of the unique SUBF host/parent of this Subhalo. This index is local to the group (i.e. 2 indicates the third most massive subhalo of the parent halo of this subhalo, not the third most massive of the whole snapshot). The values are often zero for all subhalos of a group, indicating that there is no resolved hierarchical structure in that group, beyond the primary subhalo having as direct children all of the secondary subhalos. | Pos ckpc/h Spatial position within the periodic box of the maximum bound particle. Comoving coordinate. |
SFR
\(M_\odot/yr\) Sum of the individual star formation rates of all gas cells in this subhalo. |
SFRinHalfRad
\(M_\odot/yr\) Same as SubhaloSFR, but restricted to cells within the stellar half mass radius. |
SFRinMaxRad
\(M_\odot/yr\) Same as SubhaloSFR, but restricted to cells within the radius of \(V_{max}\). |
SFRinRad
\(M_\odot/yr\) Same as SubhaloSFR, but restricted to cells within twice the stellar half mass radius. |
Spin \((kpc/h)(km/s)\) Total spin per axis, computed for each as the mass weighted sum of the relative coordinate times relative velocity of all member particles/cells. |
StarMetallicity
- Mass-weighted average metallicity (Mz/Mtot, where Z = any element above He) of the star particles bound to this Subhalo, but restricted to stars within twice the stellar half mass radius. |
StarMetallicityHalfRad Same as SubhaloStarMetallicity, but restricted to stars within the stellar half mass radius. |
StarMetallicityMaxRad
- Same as SubhaloStarMetallicity, but restricted to stars within the radius of \(V_{max}\). |
StellarPhotometrics mag Eight bands: U, B, V, K, g, r, i, z. Magnitudes based on the summed-up luminosities of all the stellar particles of the group. For details on the bands, see snapshot table for stars. |
StellarPhotometricsMassInRad
\(10^{10}M_\odot/h\) Sum of the mass of the member stellar particles, but restricted to stars within the radius SubhaloStellarPhotometricsRad. |
StellarPhotometricsRad
ckpc/h Radius at which the surface brightness profile (computed from all member stellar particles) drops below the limit of 20.7 mag arcsec\(^{-2}\) in the K band (in comoving units). |
Vel km/s Peculiar velocity of the group, computed as the sum of the mass weighted velocities of all particles/cells in this group, of all types. No unit conversion is needed. |
VelDisp
km/s One-dimensional velocity dispersion of all the member particles/cells (the 3D dispersion divided by \(\sqrt{3}\)). |
Vmax
km/s Maximum value of the spherically-averaged rotation curve. |
VmaxRad
kpc/h Comoving radius of rotation curve maximum (where \(V_{max}\) is achieved). |
WindMass
\(10^{10}M_\odot/h\) Sum of masses of all wind-phase cells in this subhalo (with Type==4 and BirthTime<=0). |
SnapByType |
HalfMassProjRad_DM
pkpc Projected physical radius enclosing half of the dark matter mass (averaged over three orthogonal projections). |
Gas_Spin pkpc km s-1 Total angular momentum per unit mass of all gas relative to the CentreOfMass. | HalfMassProjRad pkpc Projected physical radius enclosing half of the mass (averaged over three orthogonal projections). |
InitialMassWeightedBirthZ
z Mean redshift of formation of stars, weighted by birth mass. |
InitialMassWeightedStellarAge
Gyr Mean age of stars, weighted by birth mass. |
Stars_Spin pkpc km s-1 Total angular momentum per unit mass relative to the CentreOfMass. |
StellarInitialMass
Msun Sum of birth masses of all stars. |
StellarVelDisp
km s-1 Average one dimensional velocity dispersion of stars. |
ThermalEnergy
Msun (km/s)2 Total thermal energy of the gas particles. |
Aperture Measurements within a given aperture from the center of potential, available aperture sizes are: 1, 3, 5, 10, 20, 30, 40, 50, 70 and 100 pkpc. | Sizes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||

\({\rm CM}_x\)
ckpc/h |
\({\rm CM}_y\)
ckpc/h |
\({\rm CM}_z\)
ckpc/h |
\(N_{\rm gas}\) | \(N_{\rm DM}\) | unused | tracers | \(N_{\rm stars}\) | \(N_{\rm BH}\) |
\(M_{\rm gas}\)
\(10^{10}M_\odot/h\) |
\(M_{\rm DM}\)
\(10^{10}M_\odot/h\) |
unused
\(10^{10}M_\odot/h\) |
tracers
\(10^{10}M_\odot/h\) |
\(M_{\star}\)
\(10^{10}M_\odot/h\) |
\(M_{\rm BH}\)
\(10^{10}M_\odot/h\) |
x
ckpc/h |
y
ckpc/h |
z
ckpc/h |
\(v_x\)
km/s/a |
\(v_y\)
km/s/a |
\(v_z\)
km/s/a |
gas | dm | unused | tracers | stars | bh | gas | dm | unused | tracers | stars | bh |
x
ckpc/h |
y
ckpc/h |
z
ckpc/h |
gas
ckpc/h |
dm
ckpc/h |
unused
ckpc/h |
tracers
ckpc/h |
stars
ckpc/h |
bh
ckpc/h |
gas | dm | unused | tracers | stars | bh |
gas
\(10^{10}M_\odot/h\) |
dm
\(10^{10}M_\odot/h\) |
unused
\(10^{10}M_\odot/h\) |
tracers
\(10^{10}M_\odot/h\) |
stars
\(10^{10}M_\odot/h\) |
bh
\(10^{10}M_\odot/h\) |
gas
\(10^{10}M_\odot/h\) |
dm
\(10^{10}M_\odot/h\) |
unused
\(10^{10}M_\odot/h\) |
tracers
\(10^{10}M_\odot/h\) |
stars
\(10^{10}M_\odot/h\) |
bh
\(10^{10}M_\odot/h\) |
gas
\(10^{10}M_\odot/h\) |
dm
\(10^{10}M_\odot/h\) |
unused
\(10^{10}M_\odot/h\) |
tracers
\(10^{10}M_\odot/h\) |
stars
\(10^{10}M_\odot/h\) |
bh
\(10^{10}M_\odot/h\) |
gas
\(10^{10}M_\odot/h\) |
dm
\(10^{10}M_\odot/h\) |
unused
\(10^{10}M_\odot/h\) |
tracers
\(10^{10}M_\odot/h\) |
stars
\(10^{10}M_\odot/h\) |
bh
\(10^{10}M_\odot/h\) |
x
ckpc/h |
y
ckpc/h |
z
ckpc/h |
x
\((kpc/h)(km/s)\) |
y
\((kpc/h)(km/s)\) |
z
\((kpc/h)(km/s)\) |
U
mag |
B
mag |
V
mag |
K
mag |
g
mag |
r
mag |
i
mag |
z
mag |
x
km/s |
y
km/s |
z
km/s |
gas | dm | unused | tracers | stars | bh |
x
pkpc km s-1 |
y
pkpc km s-1 |
z
pkpc km s-1 |
BH
pkpc Projected physical radius enclosing half of the black hole mass (averaged over three orthogonal projections). This is constructed from the particle masses and not from the subgrid masses. |
Gas
pkpc Projected physical radius enclosing half of the gas mass (averaged over three orthogonal projections). |
Star
pkpc Projected physical radius enclosing half of the stellar mass (averaged over three orthogonal projections). |
x
pkpc km s-1 |
y
pkpc km s-1 |
z
pkpc km s-1 |
Mass_BH Msun Total (particle) mass of all black holes within the aperture. | Mass_DM Msun Total dark matter mass within the aperture. | Mass_Gas Msun Total gas mass within the aperture. | Mass_Star Msun Total stellar mass within the aperture. | SFR yr-1 Star formation rate within the aperture. | VelDisp km s-1 Stellar velocity dispersion within the aperture, with respect to the centre of mass of the galaxy. |
R_halfmass100
pkpc Half mass radius computed for mass within a spherical 100 pkpc aperture. |
R_halfmass100_projected
pkpc Projected half mass radius computed for mass within a 100 pkpc aperture (averaged over three orthogonal projections). |
R_halfmass30
pkpc Half mass radius computed for mass within a spherical 30 pkpc aperture. |
R_halfmass30_projected
pkpc Projected half mass radius computed for mass within a 30 pkpc aperture (averaged over three orthogonal projections). |
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1 Msun | 3 Msun | 5 Msun | 10 Msun | 20 Msun | 30 Msun | 40 Msun | 50 Msun | 70 Msun | 100 Msun | 1 Msun | 3 Msun | 5 Msun | 10 Msun | 20 Msun | 30 Msun | 40 Msun | 50 Msun | 70 Msun | 100 Msun | 1 Msun | 3 Msun | 5 Msun | 10 Msun | 20 Msun | 30 Msun | 40 Msun | 50 Msun | 70 Msun | 100 Msun | 1 Msun | 3 Msun | 5 Msun | 10 Msun | 20 Msun | 30 Msun | 40 Msun | 50 Msun | 70 Msun | 100 Msun | 1 yr-1 | 3 yr-1 | 5 yr-1 | 10 yr-1 | 20 yr-1 | 30 yr-1 | 40 yr-1 | 50 yr-1 | 70 yr-1 | 100 yr-1 | 1 km s-1 | 3 km s-1 | 5 km s-1 | 10 km s-1 | 20 km s-1 | 30 km s-1 | 40 km s-1 | 50 km s-1 | 70 km s-1 | 100 km s-1 |