galpy.potential.evaluateplanarphitorques

galpy.potential.evaluateplanarphitorques(Pot, R, phi=None, t=0.0, v=None)

NAME:

evaluateplanarphitorques

PURPOSE:

evaluate the phitorque of a (list of) planarPotential instance(s)

INPUT:

Pot - (list of) planarPotential instance(s)

R - Cylindrical radius (can be Quantity)

phi= azimuth (optional; can be Quantity)

t= time (optional; can be Quantity)

v = current velocity in cylindrical coordinates (optional, but required when including dissipative forces; can be a Quantity)

OUTPUT:

tau_phi(R(,phi,t))

HISTORY:

2010-07-13 - Written - Bovy (NYU)

2023-05-29 - Added velocity input for dissipative forces - Bovy (UofT)