galpy.potential.Potential.Rzderiv¶
- Potential.Rzderiv(R, z, phi=0.0, t=0.0)[source]¶
NAME:
Rzderiv
PURPOSE:
evaluate the mixed R,z 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/dz/dR
HISTORY:
2013-08-26 - Written - Bovy (IAS)