Isotropic NFW DF

class galpy.df.isotropicNFWdf(pot=None, widrow=False, rmax=10000.0, ro=None, vo=None)[source]

Class that implements the approximate isotropic spherical NFW DF (either Widrow 2000 or an improved fit by Lane et al. 2021).

__init__(pot=None, widrow=False, rmax=10000.0, ro=None, vo=None)[source]

NAME:

__init__

PURPOSE:

Initialize an isotropic NFW distribution function

INPUT:

pot= (None) NFW Potential instance

widrow= (False) if True, use the approximate form from Widrow (2000), otherwise use improved fit that has <~1e-5 relative density errors

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:

2021-02-01 - Written - Bovy (UofT)