galpy.df.jeans.sigmar¶
- galpy.df.jeans.sigmar(Pot, r, dens=None, beta=0.0)[source]¶
NAME:
sigmar
PURPOSE:
Compute the radial velocity dispersion using the spherical Jeans equation
INPUT:
Pot - potential or list of potentials (evaluated at R=r/sqrt(2),z=r/sqrt(2), sphericity not checked)
r - Galactocentric radius (can be Quantity)
dens= (None) tracer density profile (function of r); if None, the density is assumed to be that corresponding to the potential
beta= (0.) anisotropy; can be a constant or a function of r
OUTPUT:
sigma_r(r)
HISTORY:
2018-07-05 - Written - Bovy (UofT)