# 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)