galpy.potential.Potential.phizderiv¶
- Potential.phizderiv(R, z, phi=0.0, t=0.0)[source]¶
NAME:
phizderiv
PURPOSE:
evaluate the mixed azimuthal,vertical 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/dphidz
HISTORY:
2021-04-30 - Written - Bovy (UofT)