Izzo 2009 联合伽马暴和超新星限制宇宙学参数

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Title:		Extending the Hubble diagram by gamma ray bursts
Authors:		Izzo, L.; Capozziello, S.; Covone, G.; Capaccioli, M.
Affiliation:		AA(Dipartimento di Scienze Fisiche, Università di Napoli “Federico II” and INFN Sez. di Napoli, Compl. Univ. Monte S. Angelo, Ed. N, via Cinthia, 80126 Napoli, Italy capozziello@na.infn.it; ICRANet and ICRA, Piazzale della Repubblica 10, 65122 Pescara, Italy ; Dip. di Fisica, Università di Roma “La Sapienza”, Piazzale Aldo Moro 5, 00185 Roma, Italy), AB(Dipartimento di Scienze Fisiche, Università di Napoli “Federico II” and INFN Sez. di Napoli, Compl. Univ. Monte S. Angelo, Ed. N, via Cinthia, 80126 Napoli, Italy), AC(Dipartimento di Scienze Fisiche, Università di Napoli “Federico II” and INFN Sez. di Napoli, Compl. Univ. Monte S. Angelo, Ed. N, via Cinthia, 80126 Napoli, Italy), AD(Dipartimento di Scienze Fisiche, Università di Napoli “Federico II” and INFN Sez. di Napoli, Compl. Univ. Monte S. Angelo, Ed. N, via Cinthia, 80126 Napoli, Italy; INAF - VSTceN, Salita Moiariello 16, 80131 Napoli, Italy)
Publication:		Astronomy and Astrophysics, Volume 508, Issue 1, 2009, pp.63-67 (A&A Homepage)
Publication Date:		12/2009
Origin:		EDP Sciences
Keywords:		gamma rays: bursts, cosmological parameters, distance scale
DOI:		10.1051/0004-6361/200912769
Bibliographic Code:		2009A&A...508...63I

Abstract

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

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