galpy.potential.Potential.dvcircdR

Potential.dvcircdR(R, phi=None, t=0.0)[source]

Calculate the derivative of the circular velocity at R with respect to R in this potential.

Parameters:

  • R (float or Quantity) – Galactocentric radius.

  • phi (float, optional) – Azimuth to use for non-axisymmetric potentials.

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

Returns:

Derivative of the circular rotation velocity with respect to R.

Return type:

float or Quantity

Notes

  • 2013-01-08 - Written - Bovy (IAS)

  • 2016-06-28 - Added phi= keyword for non-axisymmetric potential - Bovy (UofT)