galpy.potential.Potential.vcirc¶
- Potential.vcirc(R, phi=None, t=0.0)[source]¶
NAME:
vcirc
PURPOSE:
calculate the circular velocity at R in this potential
INPUT:
R - Galactocentric radius (can be Quantity)
phi= (None) azimuth to use for non-axisymmetric potentials
t - time (optional; can be Quantity)
OUTPUT:
circular rotation velocity
HISTORY:
2011-10-09 - Written - Bovy (IAS)
2016-06-15 - Added phi= keyword for non-axisymmetric potential - Bovy (UofT)