galpy.potential.evaluateRphiderivs¶
- galpy.potential.evaluateRphiderivs(Pot, R, z, phi=None, t=0.0)[source]¶
NAME:
evaluateRphiderivs
PURPOSE:
convenience function to evaluate a possible sum of potentials
INPUT:
Pot - a potential or list of potentials
R - cylindrical Galactocentric distance (can be Quantity)
z - distance above the plane (can be Quantity)
phi - azimuth (optional; can be Quantity)
t - time (optional; can be Quantity)
OUTPUT:
d2Phi/dRdphi(R,z,phi,t)
HISTORY:
2014-06-30 - Written - Bovy (IAS)