Functions for converting between different measures of cosmological
distance.
The following parameters are used:
- z: redshift
- H0: Hubble constant in km/sec/Mpc
(example value ~70)
- omegaM: Density ratio of the universe
(example value 0.3)
- omegaLambda: Normalised cosmological constant
(example value 0.7)
For a flat universe, omegaM
+omegaLambda
=1
The terms and formulae used here are taken from the
paper by D.W.Hogg, Distance measures in cosmology,
astro-ph/9905116 v4
(2000).