Cosmological implication of the Amati relation
Contact Persons : Prof. Lorenzo Amati (amati@iasfbo.inaf.it) and Prof. Massimo della Vale (dellavalle@na.astro.it)

Because of their huge luninosities and a redshift distribution extending up to more than z = 8, Gamma-Ray Bursts (GRBs) are in principle very powerful cosmological probes. The possibility of extracting information on cosmological parameters from GRBs by means of the Amati relation, linking the isotropic-equivalent radiated energy (Eiso) to thespectral peak photon energy (Ep), has already been demonstrated by us since 2008. The aim of this project is to make a significant step forward in this investigation by: a) exploiting the substantially enriched sample of GRBs with measured redshift and spectral parameters; b) exploiting the expected observations of Cepheids up to z = 0.5 - 1 by next generation telescopes (e.g., EELT) to calibrate thr Amati relation; join the cosmological information derivable from GRBs with next generation probes like high-redshift Cepheids, high-redshift novae, improved results from Galaxy clusters.