galpy.df.jeans.sigmalos¶
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galpy.df.jeans.
sigmalos
(Pot, R, dens=None, surfdens=None, beta=0.0, sigma_r=None)[source]¶ NAME:
sigmalosPURPOSE:
Compute the line-of-sight velocity dispersion using the spherical Jeans equationINPUT:
Pot - potential or list of potentials (evaluated at R=r/sqrt(2),z=r/sqrt(2), sphericity not checked)
R - Galactocentric projected 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
surfdens= (None) tracer surface density profile (value at R or function of R); if None, the surface density is assumed to be that corresponding to the density
beta= (0.) anisotropy; can be a constant or a function of r
sigma_r= (None) if given, the solution of the spherical Jeans equation sigma_r(r) (used instead of solving the Jeans equation as part of this routine)
OUTPUT:
sigma_los(R)HISTORY:
2018-08-27 - Written - Bovy (UofT)