:  Snapshots

This table links the expansion factor, redshift, Hubble constant, and lookback time to the integer index of the snapshot (0-67) from the Millennium-II Simulation. Almost all other tables in the various Millennium-II databases have a snapnum column that corresponds to the one in this table.

snapnuminteger NOT NULLThe order of the snapshot, from 0 (z=127) to 67 (z=0)
arealNOT NULLThe expansion factor at this snapshot
zrealNOT NULLThe redshift at this snapshot
HzrealNOT NULLThe Hubble constant at this snapshot, in km/s/Mpc
lookBackTimerealNOT NULLThe lookback time at this snapshot, in 109 years