galpy.potential.Potential.conc¶
- Potential.conc(H=70.0, Om=0.3, t=0.0, overdens=200.0, wrtcrit=False, ro=None, vo=None)[source]¶
NAME:
conc
PURPOSE:
return the concentration
INPUT:
H= (default: 70) Hubble constant in km/s/Mpc
Om= (default: 0.3) Omega matter
t - time (optional; can be Quantity)
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:
concentration (scale/rvir)
HISTORY:
2014-04-03 - Written - Bovy (IAS)