Anisotropic NFW DF of the Osipkov-Merritt type¶

class galpy.df.osipkovmerrittNFWdf(pot=None, ra=1.4, rmax=10000.0, ro=None, vo=None)[source]¶

Class that implements the anisotropic spherical NFW DF with radially varying anisotropy of the Osipkov-Merritt type

\[\beta(r) = \frac{1}{1+r_a^2/r^2}\]

with \(r_a\) the anistropy radius.

__init__(pot=None, ra=1.4, rmax=10000.0, ro=None, vo=None)[source]¶

Initialize a NFW DF with Osipkov-Merritt anisotropy

Parameters:

pot (potential.NFWPotential) – NFW potential which determines the DF
ra (float or Quantity, optional) – Anisotropy radius
rmax (float or Quantity, optional) – Maximum radius to consider (set to numpy.inf to evaluate NFW w/o cut-off)
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