galpy.df.diskdf.kurtosisvT¶
- diskdf.kurtosisvT(R, romberg=False, nsigma=None, phi=0.0)[source]¶
NAME:
kurtosisvT
PURPOSE:
calculate excess kurtosis in vT 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:
kurtosisvT
HISTORY:
2011-12-07 - Written - Bovy (NYU)