Burkert potential

class galpy.potential.BurkertPotential(amp=1.0, a=2.0, normalize=False, ro=None, vo=None)[source]

BurkertPotential.py: Potential with a Burkert density

\[\rho(r) = \frac{\mathrm{amp}}{(1+r/a)\,(1+[r/a]^2)}\]
__init__(amp=1.0, a=2.0, normalize=False, ro=None, vo=None)[source]

Initialize a Burkert-density potential [1].

Parameters:

  • amp (float or Quantity) – Amplitude to be applied to the potential. Can be a Quantity with units of mass density or Gxmass density.

  • a (float or Quantity) – Scale radius.

  • 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. Default is False.

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

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

Notes

  • 2013-04-10 - Written - Bovy (IAS)

  • 2020-03-30 - Re-implemented using SphericalPotential - Bovy (UofT)

References