galpy.potential.vcirc¶
- galpy.potential.vcirc(Pot, R, phi=None, t=0.0)[source]¶
NAME:
vcirc
PURPOSE:
calculate the circular velocity at R in potential Pot
INPUT:
Pot - Potential instance or list of such instances
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)