Plummer potential¶
- class galpy.potential.PlummerPotential(amp=1.0, b=0.8, normalize=False, ro=None, vo=None)[source]¶
Class that implements the Plummer potential
\[\Phi(R,z) = -\frac{\mathrm{amp}}{\sqrt{R^2+z^2+b^2}}\]with \(\mathrm{amp} = GM\) the total mass.
- __init__(amp=1.0, b=0.8, normalize=False, ro=None, vo=None)[source]¶
NAME:
__init__
PURPOSE:
initialize a Plummer potential
INPUT:
amp - amplitude to be applied to the potential, the total mass (default: 1); can be a Quantity with units of mass or Gxmass
b - scale parameter (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:
2015-06-15 - Written - Bovy (IAS)