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Extending the Hubble diagram by gamma ray bursts

A new method to constrain the cosmological equation of state is proposed by using combined samples of gamma-ray bursts (GRBs) and supernovae (SNeIa). The Chevallier-Polarski-Linder parameterization is adopted for the equation of state in order to find out a realistic approach to achieve the deceleration/acceleration transition phase of dark energy models. We find that GRBs, calibrated by SNeIa, could be good distance indicators capable of discriminating between cosmological models and $Λ$CDM model at high redshift.

preprint2009arXivOpen access
L. IzzoS. CapozzielloG. CovoneM. Capaccioli
astro-ph.CO
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Open access4 authors1 topic
Imported metadata coverageMissing code, dataset, citation and institution fields are tracked without dominating the paper.Details
Citations: 0Reviews: 0Saves: 0Code: not linkedDataset: not linkedInstitutions: 0

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L. IzzoS. CapozzielloG. CovoneM. Capaccioli

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