Power-law density spherical potential

class galpy.potential.PowerSphericalPotential(amp=1.0, alpha=1.0, normalize=False)

Class that implements spherical potentials that are derived from power-law density models

\[\rho(r) = \mathrm{amp}\,\frac{3-\alpha}{4\,\pi}\,r^{-\alpha}\]

__init__(amp=1.0, alpha=1.0, normalize=False)

NAME:

__init__

PURPOSE:

initialize a power-law-density potential

INPUT:

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

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.

OUTPUT:

(none)

HISTORY:

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