galpy.df.sphericaldf.vmomentdensity¶
- sphericaldf.vmomentdensity(r, n, m, **kwargs)[source]¶
NAME:
vmomentdensity
PURPOSE:
calculate an arbitrary moment of the velocity distribution at r times the density
INPUT:
r - spherical radius at which to calculate the moment
n - vr^n, where vr = v x cos eta
m - vt^m, where vt = v x sin eta
OUTPUT:
<vr^n vt^m x density> at r
HISTORY:
2020-09-04 - Written - Bovy (UofT)