time N particle-data-line-1 particle-data-line-2 ... particle-data-line-Nwhere a particle-data-line contains the following numbers:
id mass x y z vx vy vz phi rho id_nearThe symbols used here are:
time (real) the time of the snapshot (in standard Heggie N-body units) N (int) the number of particles in a snapshot i (int) identification number (name) of the particle (1..N ??) m (real) the mass of the particle x,y,z (real) the three position coordinates of the particle vx,vy,vz (real) the three velocity coordinates of the particle phi (real) the potential energy per unit mass of the particle (NEGATIVE) dens (real) the density at the particle (method can differ) nn (int) the identification number (name) of the nearest neighborEach file may contain more than one snapshot, multiple snapshots should be separated by a blank line.
Atlas of the Gravitational Many-Body Problem, Hut et al.
8-apr-03 created PJT
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