Arbitrary Osipkov-Merritt DF¶
- class galpy.df.osipkovmerrittdf(pot=None, denspot=None, ra=1.4, rmax=10000.0, scale=None, ro=None, vo=None)[source]¶
Class that implements spherical DFs with Osipkov-Merritt-type orbital anisotropy
\[\beta(r) = \frac{1}{1+r_a^2/r^2}\]with \(r_a\) the anistropy radius for arbitrary combinations of potential and density profile.
- __init__(pot=None, denspot=None, ra=1.4, rmax=10000.0, scale=None, ro=None, vo=None)[source]¶
NAME:
__init__
PURPOSE:
Initialize a DF with Osipkov-Merritt anisotropy
INPUT:
pot= (None) Potential instance or list thereof
denspot= (None) Potential instance or list thereof that represent the density of the tracers (assumed to be spherical; if None, set equal to pot)
ra - anisotropy radius (can be a Quantity)
rmax= (1e4) maximum radius to consider (can be Quantity); DF is cut off at E = Phi(rmax)
scale - Characteristic scale radius to aid sampling calculations. Optionaland will also be overridden by value from pot if available.
ro=, vo= galpy unit parameters
OUTPUT:
None
HISTORY:
2021-02-07 - Written - Bovy (UofT)