galpy.potential.Potential.Rphideriv

Potential.Rphideriv(R, z, phi=0.0, t=0.0)[source]

Evaluate the mixed radial, azimuthal derivative.

Parameters:

  • R (float or Quantity) – Cylindrical Galactocentric radius.

  • z (float or Quantity) – Vertical height.

  • phi (float or Quantity, optional) – Azimuth (default: 0.0).

  • t (float or Quantity, optional) – Time (default: 0.0).

Returns:

d2Phi/dphidR.

Return type:

float or Quantity

Notes

  • 2014-06-30 - Written - Bovy (IAS)