Rockstar (smdpl.rockstar)

The table has 9320923136 rows, 80 columns.

Description

Rockstar halo catalogue with consistent merger trees

Attribution

In order to properly acknowledge our efforts, we request the following paragraph to be included in the "Acknowledgements" section of any publication which makes use of the simulation data above via the CosmoSim or MultiDark database:

Acknowledgements – Database

The CosmoSim database used in this paper is a service by the Leibniz-Institute for Astrophysics Potsdam (AIP). The MultiDark database was developed in cooperation with the Spanish MultiDark Consolider Project CSD2009-00064.

Acknowledgements – Simulations

The authors gratefully acknowledge the Gauss Centre for Supercomputing e.V. (www.gauss-centre.eu) and the Partnership for Advanced Supercomputing in Europe (PRACE, www.prace-ri.eu) for funding the MultiDark simulation project by providing computing time on the GCS Supercomputer SuperMUC at Leibniz Supercomputing Centre (LRZ, www.lrz.de). The Bolshoi simulations have been performed within the Bolshoi project of the University of California High-Performance AstroComputing Center (UC-HiPACC) and were run at the NASA Ames Research Center.

More information can be found on the credit page.

Columns

Name Type UCD Unit Description
dbid long meta.id
meta.main

unique database id for the halo

rockstarid long meta.id
meta.main

unique id for the halo, same as in Rockstar catalogue

scale double time.epoch

scale factor, same as aexp in Redshifts-table

desc_scale double time.epoch

scale factor of the descendant halo, if there is one

descid long meta.id.assoc

rockstarId of the descendant

nprog int meta.number

number of progenitors

pid long meta.id.assoc

rockstarId of least massive host halo, -1 if it is a distinct halo

upid long meta.id.assoc

rockstarId of most massive host halo, only different from pid, if halo lies within two or more larger halos

desc_pid long meta.id.assoc

pId of the descendant halo, if applicable

phantom short meta.code

flag for phantom halos, non-zero if the halo is interpolated across timesteps

mvir_sam double phys.mass h-1.solMass

halo mass, smoothed across accretion history; always greater than the sum of halo masses of contributing progenitors; only for use with selected semi-analytic models

mvir double phys.mass h-1.solMass

halo mass (within virial radius)

rvir double phys.size.radius h-1.kpc

halo radius (comoving)

rs double phys.size.radius h-1.kpc

scale radius (comoving)

vrms double phys.veloc.dispersion km.s-1

velocity dispersion (physical)

mmp short

flag indicating if the halo is the most massive progenitor or not

lastmm_scale double

scale factor of the last major merger (mass ratio > 0.3)

vmax double phys.veloc km.s-1

maximum circular velocity (physical)

x double pos.cartesian.x h-1.Mpc

halo position, comoving

y double pos.cartesian.y h-1.Mpc

halo position, comoving

z double pos.cartesian.z h-1.Mpc

halo position, comoving

vx double phys.veloc
pos.cartesian.x
km.s-1

halo velocity, physical, just "a dx/dt", i.e. no Hubble flow

vy double phys.veloc
pos.cartesian.y
km.s-1

halo velocity, physical, just "a dy/dt", i.e. no Hubble flow

vz double phys.veloc
pos.cartesian.z
km.s-1

halo velocity, physical, just "a dz/dt", i.e. no Hubble flow

angmom_x double phys.angMomentum
pos.cartesian.x
h-2.solMass.Mpc.km.s-1

halo angular momentum

angmom_y double phys.angMomentum
pos.cartesian.y
h-2.solMass.Mpc.km.s-1

halo angular momentum

angmom_z double phys.angMomentum
pos.cartesian.z
h-2.solMass.Mpc.km.s-1

halo angular momentum

spin double

halo spin parameter

breadthfirstid long meta.id

Id for breadth-first ordering of halos within a tree

depthfirstid long meta.id

Id for depth-first ordering of halos within a tree

treerootid long meta.id.assoc

rockstarId of the halo at the last timestep in the tree

forestid long meta.id.assoc

rockstarId of forest to which the halo with the given treeRootId belongs

orighaloid long meta.id.cross

original halo Id from halo finder

rockstar_snapnum int time.epoch

snapshot number (from which the halo originated), subsequent numbers for Rockstar catalogue

snapnum int time.epoch

snapshot number (from which the halo originated), same as in other halo catalogues

nextcoprog_depthfirstid long meta.id.assoc

depthFirstId of next coprogenitor

mainleaf_depthfirstid long meta.id.assoc

depthFirstId of last leaf on the main branch

lastprog_depthfirstid long meta.id.assoc

depthFirstId of last progenitor

rs_klypin double phys.size.radius

Scale radius determined using Vmax and Mvir (see Rockstar paper)

mvir_all double phys.mass h-1.solMass

Mass enclosed within the specified overdensity, including unbound particles

m200b double phys.mass h-1.solMass

Mass enclosed within overdensity 200*rho_b

m200c double phys.mass h-1.solMass

Mass enclosed within overdensity 200*rho_crit

m500c double phys.mass h-1.solMass

Mass enclosed within overdensity 500*rho_crit

m2500c double phys.mass h-1.solMass

Mass enclosed within overdensity 2500*rho_crit

xoff double pos.distance h-1.kpc

Offset of density peak from average particle position, comoving

voff double phys.veloc
arith.diff
km.s-1

Offset of density peak from average particle velocity, comoving

spin_bullock double

Bullock spin parameter (J/(sqrt(2)*GMVR))

axisratio_2_1 double

ratio of second largest shape ellipsoid axes to largest shape ellipsoid axis;shapes determined by method in Allgood et al. (2006)

axisratio_3_1 double

ratio of smallest shape ellipsoid axes to largest shape ellipsoid axis

axis1_x double h-1.kpc

coordinate of largest shape ellipsoid axis, comoving

axis1_y double h-1.kpc

coordinate of largest shape ellipsoid axis, comoving

axis1_z double h-1.kpc

coordinate of largest shape ellipsoid axis, comoving

axisratio_2_1_500c double

ratio of second largest shape ellipsoid axes to largest shape ellipsoid axis, for particles within overdensity 500*rho_crit

axisratio_3_1_500c double

ratio of smallest shape ellipsoid axes to largest shape ellipsoid axis, for particles within overdensity 500*rho_crit

axis1_x_500c double h-1.kpc

coordinate of largest shape ellipsoid axis, for particles within overdensity 500*rho_crit, comoving

axis1_y_500c double h-1.kpc

coordinate of largest shape ellipsoid axis, for particles within overdensity 500*rho_crit, comoving

axis1_z_500c double h-1.kpc

coordinate of largest shape ellipsoid axis, for particles within overdensity 500*rho_crit, comoving

t_u double phys.energy
arith.ratio

ratio of kinetic to potential energies

m_pe_behroozi double phys.mass h-1.solMass

Pseudo-evolution corrected masses (very experimental)

m_pe_diemer double phys.mass h-1.solMass

Pseudo-evolution corrected masses (very experimental)

macc double phys.mass h-1.solMass

halo mass at accretion of the halo to its host

mpeak double phys.mass h-1.solMass

peak mass over accretion history

vacc double phys.veloc km.s-1

Vmax at accretion

vpeak double phys.veloc km.s-1

peak Vmax over accretion history

halfmass_scale double time.epoch

scale factor at which the most massive progenitor (mmp) reaches 0.5*Mpeak

accrate_inst double h-1.solMass.yr-1

instantaneous halo mass accretion rate

accrate_100myr double h-1.solMass.yr-1

halo mass accretion rate averaged over passt 100 Myr

accrate_1tdyn double h-1.solMass.yr-1

halo mass accretion rate averaged over past 1*virial dynamical time

accrate_2tdyn double h-1.solMass.yr-1

halo mass accretion rate averaged over past 2*virial dynamical time

accrate_mpeak double h-1.solMass.yr-1

growth rate of Mpeak, averaged from current z to z+0.5

mpeak_scale double time.epoch

scale factor at which Mpeak was reached

acc_scale double time.epoch

scale factor at which satellites were accreted

first_acc_scale double time.epoch

scale factor at which current and former satellites first passed through a larger halo

first_acc_mvir double phys.mass h-1.solMass

Mvir at First_Acc_scale

first_acc_vmax double phys.veloc km.s-1

Vmax at First_Acc_scale

vmax_mpeak double phys.veloc km.s-1

halo Vmax at the scale at which Mpeak was reached

ix int pos.cartesian.x

spatial grid index, x-direction

iy int pos.cartesian.y

spatial grid index, y-direction

iz int pos.cartesian.z

spatial grid index, z-direction

phkey int

Peano-Hilbert key index of space-filling curve