Pseudo-isothermal potential¶
- class galpy.potential.PseudoIsothermalPotential(amp=1.0, a=1.0, normalize=False, ro=None, vo=None)[source]¶
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)[source]¶
NAME:
__init__
PURPOSE:
initialize a pseudo-isothermal potential
INPUT:
amp - amplitude to be applied to the potential (default: 1); can be a Quantity with units of mass or Gxmass
a - core radius (can be Quantity)
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.
ro=, vo= distance and velocity scales for translation into internal units (default from configuration file)
OUTPUT:
(none)
HISTORY:
2015-12-04 - Started - Bovy (UofT)