wcosmo.wcosmo.efunc#
- wcosmo.wcosmo.efunc(z, Om0, w0=-1)[source]#
Compute the \(E(z)\) function for a flat wCDM cosmology.
\[E(z; \Omega_{m,0}, w_0) = \sqrt{\Omega_{m,0} (1 + z)^3 + (1 - \Omega_{m,0}) (1 + z)^{3(1 + w_0)}}\]- Parameters:
- z: array_like
Redshift
- Om0: array_like
The matter density fraction
- w0: array_like
The (constant) equation of state parameter for dark energy
- Returns:
- E(z): array_like
The E(z) function