pygnuastro.cosmology.z_from_velocity

pygnuastro.cosmology.z_from_velocity()

Return the redshift corresponding to the given velocity (v in km/s).

Parameters:

• z (float) – Redshift

• H0 (float/None) – Hubble constant in units of km/sec/Mpc

• olambda (float/None) – Cosmological Constant

• omatter (float/None) – Matter Density

• oradiation (float/None) – Radiation Density

Returns:

The redshift corresponding to the given velocity (v in km/s).

Return type:

float