:  FofSubHalo

The table stores all the subhalos identified with the SUBFIND algorithm in the friends-of-friends groups that are stored in the FOF table in this same database.

fofId long meta.id.assoc The id of the parent FOF group in which this subhalo is embedded.
subhaloId long meta.id;meta.main The identifier of this subhalo, unique within the full simulation.
snapNum int time The snapshot number where this halo was identified.
This column corresponds to the snapnum column in the Snapshots table in MField.
np int meta.number Number of simulation particles in this subhalo.