Plummer potential

class galpy.potential.PlummerPotential(amp=1.0, b=0.8, normalize=False)

Class that implements the Plummer potential

\[\Phi(R,z) = -\frac{\mathrm{amp}}{\sqrt{R^2+z^2+b^2}}\]

__init__(amp=1.0, b=0.8, normalize=False)

NAME:

__init__

PURPOSE:

initialize a Plummer potential

INPUT:

amp - amplitude to be applied to the potential (default: 1)

b - scale parameter

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.

OUTPUT:

(none)

HISTORY:

2015-06-15 - Written - Bovy (IAS)