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]

NAME:

__init__

PURPOSE:

Initialize a NFW DF with Osipkov-Merritt anisotropy

INPUT:

pot - NFW potential which determines the DF

ra - anisotropy radius (can be a Quantity)

rmax= (1e4) maximum radius to consider (can be Quantity); set to numpy.inf to evaluate NFW w/o cut-off

ro=, vo= galpy unit parameters

OUTPUT:

None

HISTORY:

2020-11-12 - Written - Bovy (UofT)