Shu DF¶
-
class
galpy.df.
shudf
(surfaceSigma=<class 'galpy.df.surfaceSigmaProfile.expSurfaceSigmaProfile'>, profileParams=(0.3333333333333333, 1.0, 0.2), correct=False, beta=0.0, **kwargs)[source]¶ Shu’s df (1969)
-
__init__
(surfaceSigma=<class 'galpy.df.surfaceSigmaProfile.expSurfaceSigmaProfile'>, profileParams=(0.3333333333333333, 1.0, 0.2), correct=False, beta=0.0, **kwargs)[source]¶ - NAME:
- __init__
- PURPOSE:
- Initialize a Shu DF
- INPUT:
- surfaceSigma - instance or class name of the target
- surface density and sigma_R profile (default: both exponential)
- profileParams - parameters of the surface and sigma_R profile:
(xD,xS,Sro) where
xD - disk surface mass scalelength (can be Quantity)
xS - disk velocity dispersion scalelength (can be Quantity)
Sro - disk velocity dispersion at Ro (can be Quantity)
Directly given to the ‘surfaceSigmaProfile class, so could be anything that class takes
beta - power-law index of the rotation curve
correct - if True, correct the DF
ro= distance from vantage point to GC (kpc; can be Quantity)
vo= circular velocity at ro (km/s; can be Quantity)
+DFcorrection kwargs (except for those already specified)
OUTPUT:
instanceHISTORY:
2010-05-09 - Written - Bovy (NYU)
-