An Approximate Analytical Algorithm for Evaluating the Distances in a Dark Energy Dominated Universe
Astrophysics
2007-12-06 v1
Abstract
The most recent cosmological observations indicate that the present universe is flat and vacuum dominated. In such a universe, the distance measurements are always difficult and involve numerical computations. In this paper, it is shown that the most fundamental distance measurement of cosmology, the luminosity distance, for such a universe can be obtained in an approximate analytical way with very small errors of less than 0.02% up to %z = 5$ for any value of vacuum energy. The analytical calculation is shown to be exceedingly efficient, as compared to the traditional numerical methods.
Keywords
Cite
@article{arxiv.0712.0787,
title = {An Approximate Analytical Algorithm for Evaluating the Distances in a Dark Energy Dominated Universe},
author = {T. Wickramasinghe},
journal= {arXiv preprint arXiv:0712.0787},
year = {2007}
}