E

zdm.cosmology.E(z)

Dimensionless Hubble parameter E(z) = H(z)/H0.

Computes the normalized expansion rate assuming flat Lambda CDM cosmology.

Parameters:

z (float or array_like) – Redshift(s) at which to evaluate E(z).

Returns:

Dimensionless Hubble parameter E(z) = sqrt(Omega_m*(1+z)^3 + Omega_k*(1+z)^2 + Omega_lambda).

Return type:

float or ndarray