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]

Return the concentration.

Parameters:

  • H (float, optional) – Hubble constant in km/s/Mpc. Default: 70.0.

  • Om (float, optional) – Omega matter. Default: 0.3.

  • t (float or Quantity, optional) – Time. Default: 0.0.

  • overdens (float, optional) – Overdensity which defines the virial radius. Default: 200.0.

  • wrtcrit (bool, optional) – If True, the overdensity is wrt the critical density rather than the mean matter density. Default: False.

  • ro (float or Quantity, optional) – Distance scale in kpc. Default: object-wide, which if not set is 8 kpc.

  • vo (float or Quantity, optional) – Velocity scale in km/s. Default: object-wide, which if not set is 220 km/s.

Returns:

Concentration (scale/rvir).

Return type:

float

Notes

  • 2014-04-03 - Written - Bovy (IAS)