galpy.potential.NFWPotential.rvir

NFWPotential.rvir(H=70.0, Om=0.3, t=0.0, overdens=200.0, wrtcrit=False, ro=None, vo=None, use_physical=False)[source]

NAME:

rvir

PURPOSE:

calculate the virial radius for this density distribution

INPUT:

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

ro= distance scale in kpc or as Quantity (default: object-wide, which if not set is 8 kpc))

vo= velocity scale in km/s or as Quantity (default: object-wide, which if not set is 220 km/s))

OUTPUT:

virial radius

HISTORY:

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