Pseudo-isothermal potential

class galpy.potential.PseudoIsothermalPotential(amp=1.0, a=1.0, normalize=False, ro=None, vo=None)

Class that implements the pseudo-isothermal potential

\[\rho(r) = \frac{\mathrm{amp}}{4\,\pi\, a^3}\,\frac{1}{1+(r/a)^2}\]

__init__(amp=1.0, a=1.0, normalize=False, ro=None, vo=None)

Initialize a pseudo-isothermal potential.

Parameters:

• amp (float, optional) – Amplitude to be applied to the potential.

• a (float or Quantity, optional) – Core radius.

• normalize (bool, int, 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

• 2015-12-04 - Started - Bovy (UofT)