A discrete model of the effects of inhomogeneities on the cosmological redshift
arXiv:1204.0866 · doi:10.1016/j.aop.2026.170771
Abstract
We develop a discrete model to study the effects of inhomogeneities on the redshift of photons propagating on cosmological scale. Inhomogeneities are modeled with independent discrete random variables at different positions along the propagation path, and the probability distribution of the cumulative effect on the redshift is computed using the moment generating function. We find that the dispersion of the distribution is proportional to the square root of the comoving distance. We then discuss what are the implications for the estimation of background cosmological parameters, giving some examples for quantities related to the luminosity distance.
arXiv comment10 pages, 5 figures, accepted version