Constraints on the generalized Chaplygin gas model from Gamma-ray bursts

Constraints on the generalized Chaplygin gas model from Gamma-ray bursts

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...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Physics letters. B 2011-09, Vol.703 (3), p.209-216
Hauptverfasser: Freitas, R.C., Gonçalves, S.V.B., Velten, H.E.S.
Format: Artikel
Sprache:eng
Schlagworte:
Bayesian analysis
Chaplygin gas
Circularity
Elementary particles
Exact sciences and technology
Gamma ray bursts
Mathematical models
Nuclear physics
Physics
Statistics
The physics of elementary particles and fields
Universe
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung: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 α is favoured in a flat Universe and the estimated value of the parameter H0 is lower than that found in literature.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2011.07.070