galpy.df.diskdf.sigmaR2

diskdf.sigmaR2(R, romberg=False, nsigma=None, phi=0.0)

NAME:

sigmaR2 (duplicate of sigma2 for consistency)

PURPOSE:

calculate sigma_R^2 at R by marginalizing over velocity

INPUT:

R - radius at which to calculate sigma_R^2 (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:

sigma_R^2 at R

HISTORY:

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