NAME:
meanvT
PURPOSE:
calculate <vT> at R by marginalizing over velocity
INPUT:
R - radius at which to calculate <vT> (/ro)
OPTIONAL INPUT:
nsigma - number of sigma to integrate the velocities over
KEYWORDS:
romberg - if True, use a romberg integrator (default: False)
OUTPUT:
<vT> at R
HISTORY:
2011-03-30 - Written - Bovy (NYU)