darkhistory.physics.hubble

darkhistory.physics.hubble(rs, H0=np.float64(2.192711267238057e-18), omega_m=0.30966, omega_rad=np.float64(5.402015137139352e-05), omega_lambda=np.float64(0.6888463055445441))

Hubble parameter in s^-1.

Assumes a flat universe.

Parameters:

rsfloat

The redshift of interest.

H0float

The Hubble parameter today, default value H0.

omega_mfloat, optional

Omega matter today, default value omega_m.

omega_radfloat, optional

Omega radiation today, default value omega_rad.

omega_lambdafloat, optional

Omega dark energy today, default value omega_lambda.

Returns:

float