Bolshoibolshoi.FOFivo://aip.gavo.org/bolshoi/q/FOFGAVO at Leibniz-Institute for Astrophysics PotsdamRiebe K.Harry EnkeLeibnitz-Institut fr Astrophysikhenke@aip.de++49 6221 541837CosmologySimulationFriends-of-Friends halo catalogue, level 0 with relative linking
length 0.17http://gavo.aip.de/tableinfo/bolshoi.FOFbolshoiBolshoi This is an extract of the Bolshoi simulation data. It is used for
testing and demonstration purposes only. The full data is available at
https://www.cosmosim.org/.bolshoi.fofFriends-of-Friends halo catalogue, level 0 with relative linking
length 0.17fofidunique id for FOF-groupmeta.id;meta.mainlongindexedprimarysnapnumnumber of snapshot; look into redshifts-table to find the corresponding redshifttime.epochshortindexedlevellevel of substructure, indicates the different linking lengthsshortninfileline number of FOF-group in original catalogue file (= rank in file)meta.idintxcomoving position, x-componenth-1.Mpcpos.cartesian.xdoubleycomoving position, y-componenth-1.Mpcpos.cartesian.ydoublezcomoving position, z-componenth-1.Mpcpos.cartesian.zdoublevxpeculiar velocity, x-componentkm/sphys.veloc;pos.cartesian.xdoublevypeculiar velocity, y-componentkm/sphys.veloc;pos.cartesian.ydoublevzpeculiar velocity, z-componentkm/sphys.veloc;pos.cartesian.zdoublenpnumber of particles inside the FOF group ('halo')meta.numberintmasstotal mass of the FOF grouph-1.solMassphys.massdoubleindexedsize'radius' of the FOF group, if it were a sphere, computed based on the volumeh-1.Mpcphys.size.radiusdoubledispdispersionh-1.Mpcphys.dispMeasuredoubledisp_vvelocity dispersionkm/sphys.veloc.dispersiondoubledeltaoverdensity (mass/volume) in terms of mean background density rho_bphys.density;arith.ratiodoublespinspin parameter (Gottloeber and Yepes 2007, ApJ 664, 117)doubleangmom_xangular momentum, x-componenth-2.solMass.Mpc.km/sphys.angMomentum;pos.cartesian.xdoubleangmom_yangular momentum, y-componenth-2.solMass.Mpc.km/sphys.angMomentum;pos.cartesian.ydoubleangmom_zangular momentum, z-componenth-2.solMass.Mpc.km/sphys.angMomentum;pos.cartesian.zdoubleangmomabsolute value of angular momentumh-2.solMass.Mpc.km/sphys.angMomentumdoubleaxis1major axis of the ellipsoidal shape, not normalizeddoubleaxis2intermediate axis of the ellipsoidal shape, not normalizeddoubleaxis3minor axis of the ellipsoidal shape, not normalizeddoubleaxis1_xdirection of major axis, unit eigenvector of the inertia tensor, x-componentdoubleaxis1_ydirection of major axis, y-componentdoubleaxis1_zdirection of major axis, z-componentdoubleaxis2_xdirection of intermediate axis, unit eigenvector of the inertia tensor, x-componentdoubleaxis2_ydirection of intermediate axis, y-componentdoubleaxis2_zdirection of intermediate axis, z-componentdoubleaxis3_xdirection of minor axis, unit eigenvector of the inertia tensor, x-componentdoubleaxis3_ydirection of minor axis, y-componentdoubleaxis3_zdirection of minor axis, z-componentdoubleixspatial index, x-directionpos.cartesian.xintiyspatial index, y-directionpos.cartesian.yintizspatial index, z-directionpos.cartesian.zintphkeyPeano-Hilbert keyintindexed