Sparse formulae for the distance modulus in cosmology
Abstract
We review the distance modulus in twelve different cosmologies: the CDM model, the wCDM model, the Cardassian model, the flat case, the CDM cosmology, the Einstein--De Sitter model, the modified Einstein--De Sitter model, the simple~GR model, the flat expanding model, the Milne model, the plasma model and the modified tired light model. The above distance moduli are processed for three different compilations of supernovae and a supernovae + GRBs compilation: Union 2.1, JLA, the Pantheon and Union 2.1 + 59 GRBs. For each of the 48 analysed cases we report the relative cosmological parameters, the chi-square, the reduced chi-square, the AIC and the parameter. The angular distance as function of the redshift for five cosmologies is reported in the framework of the minimax approximation.
Keywords
Cite
@article{arxiv.2107.12140,
title = {Sparse formulae for the distance modulus in cosmology},
author = {Lorenzo Zaninetti},
journal= {arXiv preprint arXiv:2107.12140},
year = {2021}
}
Comments
24 pages and 11 figures. arXiv admin note: text overlap with arXiv:1602.06418