Constraining dark energy with gamma - ray bursts
نویسنده
چکیده
We use the cosmology-independent gamma-ray burst (GRB) distances of Wang (2008) to constrain dark energy cosmological model parameters. Current GRB data alone can not tightly constrain cosmological parameters and allow for a wide range of dark energy models. When used jointly with current Type Ia supernovae data and baryon acoustic peak measurements, the GRB data favor slightly lower values of nonrelativistic matter energy density. We show that with a future factor of 2 reduction in the GRB distance errors, GRBs can give very tight constraints on cosmological parameters. Subject headings: cosmological parameters — distance scale — large-scale structure of universe — GRB
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