differential_comoving_volume

Protocols

StandardCosmology.differential_comoving_volume()

DistanceMeasures.differential_comoving_volume()

ComovingDistanceMeasures.differential_comoving_volume()

HasDifferentialComovingVolume.differential_comoving_volume()

Reference

cosmo.differential_comoving_volume(z: InputT, /) → Array

Differential comoving volume in Mpc3 per steradian.

If \(V_c\) is the comoving volume of a redshift slice with solid angle \(\Omega\), this function returns

\[\mathtt{differential\_comoving\_volume(z)} = \frac{dV_c}{d\Omega \, dz} = \frac{c \, d_M^2(z)}{H(z)} \;.\]

Parameters:

zArray, positional-only

Input redshift.

Returns:

Array

The differential comoving volume \(dV_c\) in Mpc3 sr-1.