This table contains the darkmatter particles of the milliMillennium simulation.
Ordered by Snapnum and phKey. This is used in a number of functions that
can query the particles in subvolumes (sphere and boxes) of the simulation volume.
column  type  UCD  unit  description 
snapnum 
smallint 


The identifier of the snapshot for the particle. See the
millimil..snapshots table to find the redshift
and other time variables corresponding to this snapnum. 
phkey 
int 


The PeanoHilbert key corresponding to the position of this particle. Based on a 32^{3} grid. 
x 
real 

Mpc/h 

y 
real 

Mpc/h 

z 
real 

Mpc/h 

vx 
real 

km/s 

vy 
real 

km/s 

vz 
real 

km/s 

id 
bigint 


The unique identifier of this particle. Allows one to trace the particle in different timesteps
and is also the ID used by the MillimilSnapshotIDs table linking the particle to FOF groups and
Subhalos. 
