Cosmology from gamma ray bursts

Details Cosmology from gamma ray bursts Cosmology from gamma ray bursts

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jphcs.222a2026p&link_type=abstract

Journal of Physics: Conference Series, Volume 222, Issue 1, pp. 012026 (2010).

Physics

Scientific paper

In this study we propose to use Gamma Ray Bursts (GRBs) as standard candles in order to constrain the expansion history of the universe up to redshifts of z ~ 6. In particular, we utilize the 69 GRB dataset recently compiled by Cardone et al. (2009). Performing a joint likelihood analysis of the recent supernovae type Ia (SNIa) data and the GRBs we can put constraints on the main cosmological parameters (Ωm, w). However, the use of the current GRBs to trace the Hubble relation, as an alternative to the traditionally used SNIa, can not break the degeneracy between the Ωm and the dark energy equation of state parameter.

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