pynbody.analysis.gravity.accel

pynbody.analysis.gravity.accel(f, pos_vec, eps=None)

Calculates the gravitational acceleration vector at the specified position using all particles in the specified snapshot.

The gravitational softening length is determined by (in order of preference):

1. The parameter eps (scalar, unit or array)

2. The array f[‘eps’]

3. f.properties[‘eps’] (scalar or unit)