galpy.potential.dvcircdR¶

galpy.potential.dvcircdR(Pot, R, phi=None, t=0.0)[source]¶

Calculate the derivative of the circular velocity wrt R at R in potential Pot.

Parameters:

Pot (Potential or list of Potential instances) – Potential instance or list of such instances.
R (float or Quantity) – Galactocentric radius.
phi (float or Quantity, optional) – Azimuth to use for non-axisymmetric potentials.
t (float, optional) – Instantaneous time (default: 0)

Returns:

Derivative of the circular rotation velocity wrt R.

Return type:

float or Quantity

Notes