The cosmological lens equation in a universe with non zero cosmological constant
Astrophysics
2019-06-05 v1
Abstract
We derive and solve exactly the Dyer-Roeder equation in a Friedman-Robertson-Walker cosmological model with non zero cosmological constant. To take into account non homogeneous distribution of matter we use the phenomenological clumpiness parameter. We propose also a general form of an approximate solution which is simple enough to be useful in practical applications and sufficiently accurate in the interesting range of redshifts.
Keywords
Cite
@article{arxiv.astro-ph/0004376,
title = {The cosmological lens equation in a universe with non zero cosmological constant},
author = {M. Demianski and R. de Ritis and A. A. Marino and E. Piedipalumbo},
journal= {arXiv preprint arXiv:astro-ph/0004376},
year = {2019}
}
Comments
27 LaTeX Pages, including 9 Encapsulated Postscript Figures, submitted to A&A