Power-law density spherical potential¶

class galpy.potential.PowerSphericalPotential(amp=1.0, alpha=1.0, normalize=False, r1=1.0, ro=None, vo=None)[source]¶

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

\[\rho(r) = \frac{\mathrm{amp}}{r_1^3}\,\left(\frac{r_1}{r}\right)^{\alpha}\]

__init__(amp=1.0, alpha=1.0, normalize=False, r1=1.0, ro=None, vo=None)[source]¶

Initialize a power-law-density potential

Parameters:

amp (float, optional) – Amplitude to be applied to the potential (default: 1); can be a Quantity with units of mass or Gxmass
alpha (float, optional) – Power-law exponent
r1 (float, optional) – Reference radius for amplitude (can be Quantity)
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)

Notes