# Kepler potential¶

class galpy.potential.KeplerPotential(amp=1.0, normalize=False, ro=None, vo=None)[source]

Class that implements the Kepler (point mass) potential

$\Phi(r) = -\frac{\mathrm{amp}}{r}$

with $$\mathrm{amp} = GM$$ the mass.

__init__(amp=1.0, normalize=False, ro=None, vo=None)[source]

NAME:

__init__

PURPOSE:

initialize a Kepler, point-mass potential

INPUT:

amp - amplitude to be applied to the potential, the mass of the point mass (default: 1); can be a Quantity with units of mass density or Gxmass density

alpha - inner power

normalize - if True, normalize such that vc(1.,0.)=1., or, if given as a number, such that the force is this fraction of the force necessary to make vc(1.,0.)=1.

ro=, vo= distance and velocity scales for translation into internal units (default from configuration file)

OUTPUT:

(none)

HISTORY:

2010-07-10 - Written - Bovy (NYU)