galpy.potential.epifreq

galpy.potential.epifreq(Pot, R, t=0.0)[source]

NAME:

epifreq

PURPOSE:

calculate the epicycle frequency at R in the potential Pot

INPUT:

Pot - Potential instance or list thereof

R - Galactocentric radius (can be Quantity)

t - time (optional; can be Quantity)

OUTPUT:

epicycle frequency

HISTORY:

2012-07-25 - Written - Bovy (IAS)