Arbitrary constant-anisotropy DF¶
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class
galpy.df.
constantbetadf
(pot=None, denspot=None, beta=0.0, twobeta=None, rmax=None, scale=None, ro=None, vo=None)[source]¶ Class that implements DFs of the form \(f(E,L) = L^{-2\beta} f_1(E)\) with constant \(\beta\) anisotropy parameter for a given density profile
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__init__
(pot=None, denspot=None, beta=0.0, twobeta=None, rmax=None, scale=None, ro=None, vo=None)[source]¶ NAME:
__init__PURPOSE:
Initialize a spherical DF with constant anisotropy parameterINPUT:
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)
beta= (0.) anisotropy parameter
twobeta= (None) twice the anisotropy parameter (useful for eta = half-integer, which is a special case); has priority over beta
rmax= (None) 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:
NoneHISTORY:
2021-02-14 - Written - Bovy (UofT)
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