hmfast.halos.concentration.B13Concentration

class hmfast.halos.concentration.B13Concentration[source]

Bases: Concentration

Concentration-mass relation from Bhattacharya et al. (2013).

The fitted relation is

\[c_\Delta(M, z) = A D(z)^B \nu^C\]

where \(D(z)\) is the linear growth factor and \(\nu(M, z) = \frac{\delta_c}{\sigma(M, z)}\), with \(\delta_c \approx 1.686\) and \(\sigma(M, z)\) the linear-theory variance of the density field smoothed on the mass scale \(M\).

Calibrated for 200c, 200m, and virial mass definitions.

Methods

c_delta(cosmology, m, z[, mass_definition])

Compute the concentration parameter.

c_delta(cosmology, m, z, mass_definition=<hmfast.halos.massdef.MassDefinition object>)[source]

Compute the concentration parameter.

Parameters:

cosmologyCosmology: Cosmology used to evaluate the concentration relation.
marray-like: Halo masses in physical \(M_\odot\).
zarray-like: Redshifts.
mass_definitionMassDefinition, optional: Target halo mass definition. Defaults to MassDefinition(delta="vir", reference="critical").

Returns:

float or array-like: Concentration values with shape \((N_m, N_z)\), where singleton dimensions get squeezed before return.