Constraints on the Generalized Chaplygin Gas Model from Gamma-Ray Bursts

Details Constraints on the Generalized Chaplygin Gas Model from Gamma-Ray Bursts Constraints on the Generalized Chaplygin Gas Model from Gamma-Ray Bursts

2010-04-30

arxiv.org/abs/1004.5585v2

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

10 pages, 29 figures, accepted for publication in Physics Letters B

Scientific paper

10.1016/j.physletb.2011.07.070

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 $\alpha$ is favoured if we adopt a flat Universe and the estimated value of the parameter $H_{0}$ is lower than that found in literature.

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