##### CAMELS
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.
###### Active Filters
Use "*" as wildcard
μ : {{filter.aggs.avg?filter.render(filter.aggs.avg):'no data'}}
Examples:{{ bucket.key }}

Range:

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

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

Select field to filter
###### Python Query

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

###### Fields Dictionary
Field Variable Type Units Description
simulation_suite simulation_suite byte e.g. 'IllustrisTNG' or 'SIMBA'.
simulation_set simulation_set byte e.g. 'LH', '1P', 'CV' or 'EX'.
simulation_set_id simulation_set_id short Integer ID of the simulation set. E.g. for IllustrisTNG LH 12, this value is '12'.
params float Simulation parameter:
Omega_m params_Omega_m float The cosmic density of matter relative to the critical density.
sigma_8 params_sigma_8 float The normalization of the primordial density fluctuations.
A_SN1 params_A_SN1 float A normalization factor for the flux of galactic winds.
A_AGN1 params_A_AGN1 float A normalization factor for the overall energy output of AGN feedback.
A_SN2 params_A_SN2 float A normalization factor for the speed of galactic winds.
A_AGN2 params_A_AGN2 float A normalization factor for the specific energy of AGN feedback.
snap snapshot short Snapshot number, which can be connected to the redshift of the snapshot.
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
$${\rm CM}_y$$ Group_CM_y float
$${\rm CM}_z$$ Group_CM_z float
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.
GasMetalFractions float Individual abundances: dimensionless ratio of the total mass in that species divided by the total gas mass, for all gas cells in the group.
H Group_GasMetalFractions_H float
He Group_GasMetalFractions_He float
C Group_GasMetalFractions_C float
N Group_GasMetalFractions_N float
O Group_GasMetalFractions_O float
Ne Group_GasMetalFractions_Ne float
Mg Group_GasMetalFractions_Mg float
Si Group_GasMetalFractions_Si float
Fe Group_GasMetalFractions_Fe float
total Group_GasMetalFractions_total float The 'total' of all other (i.e. untracked) metals.
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
$$M_{\rm DM}$$ Group_MassType_dm float
unused Group_MassType_unused float
tracers Group_MassType_tracers float
$$M_{\star}$$ Group_MassType_stars float
$$M_{\rm BH}$$ Group_MassType_bh float
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
y Group_Pos_y float
z Group_Pos_z float
SFR Group_SFR float $$M_\odot/yr$$ Sum of the individual star formation rates of all gas cells in this group.
StarMetalFractions float Individual abundances: dimensionless ratio of the total mass in that species divided by the total stellar mass, for all stars in the group.
H Group_StarMetalFractions_H float
He Group_StarMetalFractions_He float
C Group_StarMetalFractions_C float
N Group_StarMetalFractions_N float
O Group_StarMetalFractions_O float
Ne Group_StarMetalFractions_Ne float
Mg Group_StarMetalFractions_Mg float
Si Group_StarMetalFractions_Si float
Fe Group_StarMetalFractions_Fe float
total Group_StarMetalFractions_total float The 'total' of all other (i.e. untracked) metals.
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
$$v_y$$ Group_Vel_y float
$$v_z$$ Group_Vel_z float
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.
Subhalo float Subfind Subhalos
id Subhalo_id integer Subhalo 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.
BfldDisk Subhalo_BfldDisk float $$(h/a^2)(\rm{UnitPressure})^{1/2}$$ The square root of the volume weighted value of $B^{2}$ for all gas cells within the canonical two times the stellar half mass radius. This value gives a magnetic field strength which would have the same amount of mean magnetic energy as the galaxy cells.
BfldHalo Subhalo_BfldHalo float $$(h/a^2)(\rm{UnitPressure})^{1/2}$$ The square root of the volume weighted value of $B^{2}$ for all gas cells in the subhalo. This value gives a magnetic field strength which would have the same amount of mean magnetic energy as the subhalo cells.
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
y Subhalo_CM_y float
z Subhalo_CM_z float
GasMetalFractions float Individual abundances: dimensionless ratio of the total mass in that species divided by the total gas mass, both restricted to gas cells within twice the stellar half mass radius.
H Subhalo_GasMetalFractions_H float
He Subhalo_GasMetalFractions_He float
C Subhalo_GasMetalFractions_C float
N Subhalo_GasMetalFractions_N float
O Subhalo_GasMetalFractions_O float
Ne Subhalo_GasMetalFractions_Ne float
Mg Subhalo_GasMetalFractions_Mg float
Si Subhalo_GasMetalFractions_Si float
Fe Subhalo_GasMetalFractions_Fe float
total Subhalo_GasMetalFractions_total float The 'total' of all other (i.e. untracked) metals.
GasMetalFractionsHalfRad float Same as SubhaloGasMetalFractions, but restricted to cells within the stellar half mass radius.
H Subhalo_GasMetalFractionsHalfRad_H float
He Subhalo_GasMetalFractionsHalfRad_He float
C Subhalo_GasMetalFractionsHalfRad_C float
N Subhalo_GasMetalFractionsHalfRad_N float
O Subhalo_GasMetalFractionsHalfRad_O float
Ne Subhalo_GasMetalFractionsHalfRad_Ne float
Mg Subhalo_GasMetalFractionsHalfRad_Mg float
Si Subhalo_GasMetalFractionsHalfRad_Si float
Fe Subhalo_GasMetalFractionsHalfRad_Fe float
total Subhalo_GasMetalFractionsHalfRad_total float The 'total' of all other (i.e. untracked) metals.
GasMetalFractionsMaxRad float Same as SubhaloGasMetalFractions, but restricted to cells within the radius of $V_{ m max} H Subhalo_GasMetalFractionsMaxRad_H float He Subhalo_GasMetalFractionsMaxRad_He float C Subhalo_GasMetalFractionsMaxRad_C float N Subhalo_GasMetalFractionsMaxRad_N float O Subhalo_GasMetalFractionsMaxRad_O float Ne Subhalo_GasMetalFractionsMaxRad_Ne float Mg Subhalo_GasMetalFractionsMaxRad_Mg float Si Subhalo_GasMetalFractionsMaxRad_Si float Fe Subhalo_GasMetalFractionsMaxRad_Fe float total Subhalo_GasMetalFractionsMaxRad_total float The 'total' of all other (i.e. untracked) metals. GasMetalFractionsSfr float Same as SubhaloGasMetalFractions, but restricted to cells which are star-forming. H Subhalo_GasMetalFractionsSfr_H float He Subhalo_GasMetalFractionsSfr_He float C Subhalo_GasMetalFractionsSfr_C float N Subhalo_GasMetalFractionsSfr_N float O Subhalo_GasMetalFractionsSfr_O float Ne Subhalo_GasMetalFractionsSfr_Ne float Mg Subhalo_GasMetalFractionsSfr_Mg float Si Subhalo_GasMetalFractionsSfr_Si float Fe Subhalo_GasMetalFractionsSfr_Fe float total Subhalo_GasMetalFractionsSfr_total float The 'total' of all other (i.e. untracked) metals. GasMetalFractionsSfrWeighted float Same as SubhaloGasMetalFractions, but weighted by the cell star-formation rate rather than the cell mass. H Subhalo_GasMetalFractionsSfrWeighted_H float He Subhalo_GasMetalFractionsSfrWeighted_He float C Subhalo_GasMetalFractionsSfrWeighted_C float N Subhalo_GasMetalFractionsSfrWeighted_N float O Subhalo_GasMetalFractionsSfrWeighted_O float Ne Subhalo_GasMetalFractionsSfrWeighted_Ne float Mg Subhalo_GasMetalFractionsSfrWeighted_Mg float Si Subhalo_GasMetalFractionsSfrWeighted_Si float Fe Subhalo_GasMetalFractionsSfrWeighted_Fe float total Subhalo_GasMetalFractionsSfrWeighted_total float The 'total' of all other (i.e. untracked) metals. 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 dm Subhalo_HalfmassRadType_dm float unused Subhalo_HalfmassRadType_unused float tracers Subhalo_HalfmassRadType_tracers float stars Subhalo_HalfmassRadType_stars float bh Subhalo_HalfmassRadType_bh float IDMostbound Subhalo_IDMostbound integer 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 dm Subhalo_MassInHalfRadType_dm float unused Subhalo_MassInHalfRadType_unused float tracers Subhalo_MassInHalfRadType_tracers float stars Subhalo_MassInHalfRadType_stars float bh Subhalo_MassInHalfRadType_bh float 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 dm Subhalo_MassInMaxRadType_dm float unused Subhalo_MassInMaxRadType_unused float tracers Subhalo_MassInMaxRadType_tracers float stars Subhalo_MassInMaxRadType_stars float bh Subhalo_MassInMaxRadType_bh float 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 dm Subhalo_MassInRadType_dm float unused Subhalo_MassInRadType_unused float tracers Subhalo_MassInRadType_tracers float stars Subhalo_MassInRadType_stars float bh Subhalo_MassInRadType_bh float 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 dm Subhalo_MassType_dm float unused Subhalo_MassType_unused float tracers Subhalo_MassType_tracers float stars Subhalo_MassType_stars float bh Subhalo_MassType_bh float Parent Subhalo_Parent integer Index back into this same Subhalo table of the unique Subfind 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 y Subhalo_Pos_y float z Subhalo_Pos_z float 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 y Subhalo_Spin_y float z Subhalo_Spin_z float StarMetalFractions float Individual abundances: dimensionless ratio of the total mass in that species divided by the total stellar mass, both restricted to stars within twice the stellar half mass radius. H Subhalo_StarMetalFractions_H float He Subhalo_StarMetalFractions_He float C Subhalo_StarMetalFractions_C float N Subhalo_StarMetalFractions_N float O Subhalo_StarMetalFractions_O float Ne Subhalo_StarMetalFractions_Ne float Mg Subhalo_StarMetalFractions_Mg float Si Subhalo_StarMetalFractions_Si float Fe Subhalo_StarMetalFractions_Fe float total Subhalo_StarMetalFractions_total float The 'total' of all other (i.e. untracked) metals. StarMetalFractionsHalfRad float Same as StarMetalFractions, but restricted to cells within the stellar half mass radius. H Subhalo_StarMetalFractionsHalfRad_H float He Subhalo_StarMetalFractionsHalfRad_He float C Subhalo_StarMetalFractionsHalfRad_C float N Subhalo_StarMetalFractionsHalfRad_N float O Subhalo_StarMetalFractionsHalfRad_O float Ne Subhalo_StarMetalFractionsHalfRad_Ne float Mg Subhalo_StarMetalFractionsHalfRad_Mg float Si Subhalo_StarMetalFractionsHalfRad_Si float Fe Subhalo_StarMetalFractionsHalfRad_Fe float total Subhalo_StarMetalFractionsHalfRad_total float The 'total' of all other (i.e. untracked) metals. StarMetalFractionsMaxRad float Same as StarMetalFractions, but restricted to stars within the radius of$V_{ m max}$. H Subhalo_StarMetalFractionsMaxRad_H float He Subhalo_StarMetalFractionsMaxRad_He float C Subhalo_StarMetalFractionsMaxRad_C float N Subhalo_StarMetalFractionsMaxRad_N float O Subhalo_StarMetalFractionsMaxRad_O float Ne Subhalo_StarMetalFractionsMaxRad_Ne float Mg Subhalo_StarMetalFractionsMaxRad_Mg float Si Subhalo_StarMetalFractionsMaxRad_Si float Fe Subhalo_StarMetalFractionsMaxRad_Fe float total Subhalo_StarMetalFractionsMaxRad_total float The 'total' of all other (i.e. untracked) metals. 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 B Subhalo_StellarPhotometrics_B float V Subhalo_StellarPhotometrics_V float K Subhalo_StellarPhotometrics_K float g Subhalo_StellarPhotometrics_g float r Subhalo_StellarPhotometrics_r float i Subhalo_StellarPhotometrics_i float z Subhalo_StellarPhotometrics_z float 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 y Subhalo_Vel_y float z Subhalo_Vel_z float 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&#60;=0). ###### About Catalog CAMELS stands for Cosmology and Astrophysics with MachinE Learning Simulations, and is a suite 4,233 cosmological simulations: 2,049 N-body and 2,184 state-of-the-art (magneto-)hydrodynamic suites. The CAMELS simulations can be organized in three different suites: • IllustrisTNG. This suite contains 1,092 hydrodynamic simulations that have been run with the AREPO code employing the same subgrid physics as the original IllustrisTNG simulations. • SIMBA. This suite contains 1,092 hydrodynamic simulations that have been run with the GIZMO code employing the same subgrid physics as the original SIMBA simulation. • N-body. This suite contains 2,049 N-body simulation. For each CAMELS hydrodynamic simulation there is an N-body simulation with the same cosmology and value of the initial random seed as its hydrodynamic counterpart. Each simulation suite contains four different simulation sets: • LH. This set contains 1,000 simulations. Each simulation has a different value of the cosmological and astrophysical parameters, that are arranged in a latin-hypercube. Each simulation has a different value of the initial random seed. This set represents the main CAMELS dataset. LH stands for Latin-Hypercube. • 1P. This set contains 61 simulations. In this set, the value of the cosmological and astrophysical parameters in the simulations is varied only one at a time. The value of the random seed is the same in all simulations. This set is typically used to study the change induced by cosmology and astrophysics in a given quantity. 1P stands for 1-parameter at a time. • CV. This set contains 27 simulations. All the simulations share the value of the cosmological and astrophysical parameters, and they only differ in the value of their initial random seed. This set is typically used to study the effect of cosmic variance. CV stands for Cosmic Variance. • EX. This set contains 4 simulations. All simulations share the value of the cosmological parameters, but differ in the value of the astrophysical parameters. One simulation has fiducial values; the other three represent extreme cases with 1) very efficient supernova feedback, 2) very efficient AGN feedback, and 3) no feedback. All simulations share the value of the initial random seed. This set can be used to study the maximum effect astrophysics can have on a given quantity. EX stands for Extreme. For more information on CAMELS, please consult the documentation and the project website. More under: Active Filters {{filter.field.name}} Format ##### Raw Data simulation_suite e.g. 'IllustrisTNG' or 'SIMBA'. simulation_set e.g. 'LH', '1P', 'CV' or 'EX'. simulation_set_id Integer ID of the simulation set. E.g. for IllustrisTNG LH 12, this value is '12'. params Simulation parameter: snap Snapshot number, which can be connected to the redshift of the snapshot. z Redshift of the snapshot corresponding to this group catalog. type id Group index number Group FoF Halos Subhalo Subfind Subhalos Omega_m The cosmic density of matter relative to the critical density. sigma_8 The normalization of the primordial density fluctuations. A_SN1 A normalization factor for the flux of galactic winds. A_AGN1 A normalization factor for the overall energy output of AGN feedback. A_SN2 A normalization factor for the speed of galactic winds. A_AGN2 A normalization factor for the specific energy of AGN feedback. 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. GasMetalFractions Individual abundances: dimensionless ratio of the total mass in that species divided by the total gas mass, for all gas cells in the group. 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. StarMetalFractions Individual abundances: dimensionless ratio of the total mass in that species divided by the total stellar mass, for all stars in the 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. id Subhalo 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. BfldDisk $$(h/a^2)(\rm{UnitPressure})^{1/2}$$ The square root of the volume weighted value of$B^{2}$for all gas cells within the canonical two times the stellar half mass radius. This value gives a magnetic field strength which would have the same amount of mean magnetic energy as the galaxy cells. BfldHalo $$(h/a^2)(\rm{UnitPressure})^{1/2}$$ The square root of the volume weighted value of$B^{2}$for all gas cells in the subhalo. This value gives a magnetic field strength which would have the same amount of mean magnetic energy as the subhalo cells. 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. GasMetalFractions Individual abundances: dimensionless ratio of the total mass in that species divided by the total gas mass, both restricted to gas cells within twice the stellar half mass radius. GasMetalFractionsHalfRad Same as SubhaloGasMetalFractions, but restricted to cells within the stellar half mass radius. GasMetalFractionsMaxRad Same as SubhaloGasMetalFractions, but restricted to cells within the radius of$V_{ m max} GasMetalFractionsSfr Same as SubhaloGasMetalFractions, but restricted to cells which are star-forming. GasMetalFractionsSfrWeighted Same as SubhaloGasMetalFractions, but weighted by the cell star-formation rate rather than the cell mass. 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 back into this same Subhalo table of the unique Subfind 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. StarMetalFractions Individual abundances: dimensionless ratio of the total mass in that species divided by the total stellar mass, both restricted to stars within twice the stellar half mass radius. StarMetalFractionsHalfRad Same as StarMetalFractions, but restricted to cells within the stellar half mass radius. StarMetalFractionsMaxRad Same as StarMetalFractions, but restricted to stars within the radius of $V_{ m max}$. 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&#60;=0).
$${\rm CM}_x$$ $${\rm CM}_y$$ $${\rm CM}_z$$ H He C N O Ne Mg Si Fe total The 'total' of all other (i.e. untracked) metals. $$N_{\rm gas}$$ $$N_{\rm DM}$$ unused tracers $$N_{\rm stars}$$ $$N_{\rm BH}$$ $$M_{\rm gas}$$ $$M_{\rm DM}$$ unused tracers $$M_{\star}$$ $$M_{\rm BH}$$ x y z H He C N O Ne Mg Si Fe total The 'total' of all other (i.e. untracked) metals. $$v_x$$ $$v_y$$ $$v_z$$ x y z H He C N O Ne Mg Si Fe total The 'total' of all other (i.e. untracked) metals. H He C N O Ne Mg Si Fe total The 'total' of all other (i.e. untracked) metals. H He C N O Ne Mg Si Fe total The 'total' of all other (i.e. untracked) metals. H He C N O Ne Mg Si Fe total The 'total' of all other (i.e. untracked) metals. H He C N O Ne Mg Si Fe total The 'total' of all other (i.e. untracked) metals. gas dm unused tracers stars bh gas dm unused tracers stars bh gas dm unused tracers stars bh gas dm unused tracers stars bh gas dm unused tracers stars bh gas dm unused tracers stars bh x y z x y z H He C N O Ne Mg Si Fe total The 'total' of all other (i.e. untracked) metals. H He C N O Ne Mg Si Fe total The 'total' of all other (i.e. untracked) metals. H He C N O Ne Mg Si Fe total The 'total' of all other (i.e. untracked) metals. U B V K g r i z x y z