Kepler potential

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

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)

Initialize a Kepler, point-mass potential.

Parameters:

• amp (float or Quantity, optional) – Amplitude to be applied to the potential, the mass of the point mass (default: 1); can be a Quantity with units of mass or Gxmass.

• normalize (bool or float, optional) – 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 (float, optional) – Distance scale for translation into internal units (default from configuration file).

• vo (float, optional) – Velocity scale for translation into internal units (default from configuration file).

Return type:

None

Notes

• 2010-07-10: Written by Bovy (NYU)