galpy.potential.evaluateplanarR2derivs¶
- galpy.potential.evaluateplanarR2derivs(Pot, R, phi=None, t=0.0)[source]¶
NAME:
evaluateplanarR2derivs
PURPOSE:
evaluate the second radial derivative of a (list of) planarPotential instance(s)
INPUT:
Pot - (list of) planarPotential instance(s)
R - Cylindrical radius (can be Quantity)
phi= azimuth (optional; can be Quantity)
t= time (optional; can be Quantity)
OUTPUT:
F_R(R(,phi,t))
HISTORY:
2010-10-09 - Written - Bovy (IAS)