Gamma ray burst distances and the timescape cosmology
Cosmology and Nongalactic Astrophysics
2012-02-01 v2 General Relativity and Quantum Cosmology
Abstract
Gamma ray bursts can potentially be used as distance indicators, providing the possibility of extending the Hubble diagram to redshifts ~7. Here we follow the analysis of Schaefer (2007), with the aim of distinguishing the timescape cosmological model from the \LambdaCDM model by means of the additional leverage provided by GRBs in the range 2 < z < 7. We find that the timescape model fits the GRB sample slightly better than the \LambdaCDM model, but that the systematic uncertainties are still too little understood to distinguish the models.
Keywords
Cite
@article{arxiv.1107.5596,
title = {Gamma ray burst distances and the timescape cosmology},
author = {Peter R. Smale},
journal= {arXiv preprint arXiv:1107.5596},
year = {2012}
}
Comments
7 pages, 7 figures, revised version accepted for publication in MNRAS