galpy.df.diskdf.meanvR

diskdf.meanvR(R, romberg=False, nsigma=None, phi=0.0)[source]

Calculate <vR> at R by marginalizing over velocity.

Parameters:

  • R (float) – Radius at which to calculate <vR>.

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

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

  • phi (float, optional) – Azimuth angle at which to calculate <vR>.

Returns:

<vR> at R.

Return type:

float or Quantity

Notes

  • 2011-03-30 - Written - Bovy (NYU).