Probing cosmological parameters with GRBs

Details Probing cosmological parameters with GRBs Probing cosmological parameters with GRBs

2004-01-13

arxiv.org/abs/astro-ph/0401244v1

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, to appear in the Proceedings of the Conference "30 Years of GRB Discovery", Santa Fe, New Mexico, USA, Sep

Scientific paper

10.1063/1.1810900

In light of the recent finding of the narrow clustering of the geometrically-corrected gamma-ray energies emitted by Gamma Ray Bursts (GRBs), we investigate the possibility to use these sources as standard candles to probe cosmological parameters such as the matter density Omega_m and the cosmological constant energy density Omega_Lambda. By simulating different samples of gamma-ray bursts, based on recent observational results, we find that Omega_m (with the prior Omega_m + Omega_Lambda = 1) can be determined with accuracy ~7% with data from 300 GRBs, provided a local calibration of the standard candles be achieved.

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