galpy.df.diskdf.meanvR¶
- diskdf.meanvR(R, romberg=False, nsigma=None, phi=0.0)[source]¶
NAME:
meanvR
PURPOSE:
calculate <vR> at R by marginalizing over velocity
INPUT:
R - radius at which to calculate <vR> (can be Quantity)
OPTIONAL INPUT:
nsigma - number of sigma to integrate the velocities over
KEYWORDS:
romberg - if True, use a romberg integrator (default: False)
OUTPUT:
<vR> at R
HISTORY:
2011-03-30 - Written - Bovy (NYU)