Isotropic Plummer DF¶

class galpy.df.isotropicPlummerdf(pot=None, ro=None, vo=None)[source]¶

Class that implements isotropic spherical Plummer DF:

\[f(E) = {24\sqrt{2} \over 7\pi^3}\,{b^2\over (GM)^5}\,(-E)^{7/2}\]

for \(-GM/b \leq E \leq 0\) and zero otherwise. The parameter \(GM\) is the total mass and \(b\) the Plummer profile’s scale parameter.

__init__(pot=None, ro=None, vo=None)[source]¶

Initialize an isotropic Plummer distribution function

Parameters:

pot (Potential object) – Plummer Potential instance
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