galpy.potential.Potential.phizderiv

Potential.phizderiv(R, z, phi=0.0, t=0.0)

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)