galpy.potential.NFWPotential.rvir

NFWPotential.rvir(vo, ro, H=70.0, Om=0.3, overdens=200.0, wrtcrit=False)

NAME:

rvir

PURPOSE:

calculate the virial radius for this density distribution

INPUT:

vo - velocity unit in km/s

ro - length unit in kpc

H= (default: 70) Hubble constant in km/s/Mpc

Om= (default: 0.3) Omega matter

overdens= (200) overdensity which defines the virial radius

wrtcrit= (False) if True, the overdensity is wrt the critical density rather than the mean matter density

OUTPUT:

virial radius in natural units

HISTORY:

2014-01-29 - Written - Bovy (IAS)