sfr_evolution

zdm.cosmology.sfr_evolution(z, *params)

Star formation rate evolution model from Madau & Dickinson (2014).

Computes the cosmic star formation rate raised to a power n, normalized to unity at z=0.

Parameters:

• z (float or array_like) – Redshift.

• *params (float) – First parameter is n, the power to which the SFR is raised. Typically n=1 for direct SFR tracking.

Returns:

Relative source density at redshift z, normalized to 1 at z=0.

Return type:

float or ndarray