Jaffe potential

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

Class that implements the Jaffe potential

\[\rho(r) = \frac{\mathrm{amp}}{4\,\pi\,a^3}\,\frac{1}{(r/a)^2\,(1+r/a)^{2}}\]
__init__(amp=1.0, a=1.0, normalize=False, ro=None, vo=None)[source]

Initialize a Jaffe Potential.

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

  • a (float or Quantity, optional) – Scale radius (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 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

  • 2010-07-09 - Written - Bovy (NYU)