galpy.df.jeans.sigmar

galpy.df.jeans.sigmar(Pot, r, dens=None, beta=0.0)[source]

Compute the radial velocity dispersion using the spherical Jeans equation

Parameters:

  • Pot (potential or list of potentials) – Gravitational potential; evaluated at R=r/sqrt(2),z=r/sqrt(2), sphericity not checked.

  • r (float or Quantity) – Galactocentric radius

  • dens (function, optional) – tracer density profile (function of r); if None, the density is assumed to be that corresponding to the potential

  • beta (float or function, optional) – anisotropy; can be a constant or a function of r

Returns:

sigma_r(r)

Return type:

float

Notes

  • 2018-07-05 - Written - Bovy (UofT)