Constraints on the Generalized Chaplygin Gas Model from Gamma-Ray Bursts
Cosmology and Nongalactic Astrophysics
2011-08-19 v2 High Energy Astrophysical Phenomena
Abstract
We study the Generalized Chaplygin gas model (GCGM) using Gamma-ray bursts as cosmological probes. In order to avoid the so-called circularity problem we use cosmology-independent data set and Bayesian statistics to impose constraints on the model parameters. We observe that a negative value for the parameter is favoured if we adopt a flat Universe and the estimated value of the parameter is lower than that found in literature.
Keywords
Cite
@article{arxiv.1004.5585,
title = {Constraints on the Generalized Chaplygin Gas Model from Gamma-Ray Bursts},
author = {R. C. Freitas and S. V. B. Gonçalves and H. E. S. Velten},
journal= {arXiv preprint arXiv:1004.5585},
year = {2011}
}
Comments
10 pages, 29 figures, accepted for publication in Physics Letters B