galpy.potential.evaluateR2derivs¶
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galpy.potential.
evaluateR2derivs
(Pot, R, z, phi=None, t=0.0)¶ NAME:
evaluateR2derivsPURPOSE:
convenience function to evaluate a possible sum of potentialsINPUT:
Pot - a potential or list of potentials (dissipative forces in such a list are ignored)
R - cylindrical Galactocentric distance (can be Quantity)
z - distance above the plane (can be Quantity)
phi - azimuth (optional; can be Quantity)
t - time (optional; can be Quantity)
OUTPUT:
d2Phi/d2R(R,z,phi,t)HISTORY:
2012-07-25 - Written - Bovy (IAS)