galpy.potential.Potential.Rphideriv¶
- Potential.Rphideriv(R, z, phi=0.0, t=0.0)[source]¶
NAME:
Rphideriv
PURPOSE:
evaluate the mixed radial, azimuthal derivative
INPUT:
R - Galactocentric radius (can be Quantity)
Z - vertical height (can be Quantity)
phi - Galactocentric azimuth (can be Quantity)
t - time (can be Quantity)
OUTPUT:
d2Phi/dphidR
HISTORY:
2014-06-30 - Written - Bovy (IAS)