galpy.df.diskdf.surfacemassLOS

diskdf.surfacemassLOS(d, l, deg=True, target=True, romberg=False, nsigma=None, relative=None)[source]

Evaluate the surface mass along the line of sight (LOS) given Galactic longitude and distance.

Parameters:

  • d (float or Quantity) – Distance along the line of sight.

  • l (float or Quantity) – Galactic longitude (in deg, unless deg=False).

  • nsigma (float, optional) – Number of sigma to integrate the velocities over.

  • target (bool, optional) – If True, use target surfacemass (default).

  • romberg (bool, optional) – If True, use a romberg integrator (default: False).

  • deg (bool, optional) – If False, l is in radians.

  • relative (bool, optional) – If True, return d.

Returns:

Sigma(d,l) x d

Return type:

float

Notes

  • 2011-03-24 - Written - Bovy (NYU)