Wei, Hao 2010 用Amati关系限制7个不同的宇宙学模型

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Title:		Observational constraints on cosmological models with the updated long gamma-ray bursts
Authors:		Wei, Hao
Publication:		Journal of Cosmology and Astroparticle Physics, Issue 08, pp. 020 (2010). (JCAP Homepage)
Publication Date:		08/2010
Origin:		IOP
DOI:		10.1088/1475-7516/2010/08/020
Bibliographic Code:		2010JCAP...08..020W

Abstract

In the present work, by the help of the newly released Union2 compilation which consists of 557 Type Ia supernovae (SNIa), we calibrate 109 long Gamma-Ray Bursts (GRBs) with the well-known Amati relation, using the cosmology-independent calibration method proposed by Liang et al.. We have obtained 59 calibrated high-redshift GRBs which can be used to constrain cosmological models without the circularity problem (we call them ``Hymnium'' GRBs sample for convenience). Then, we consider the joint constraints on 7 cosmological models from the latest observational data, namely, the combination of 557 Union2 SNIa dataset, 59 calibrated Hymnium GRBs dataset (obtained in this work), the shift parameter R from the WMAP 7-year data, and the distance parameter A of the measurement of the baryon acoustic oscillation (BAO) peak in the distribution of SDSS luminous red galaxies. We also briefly consider the comparison of these 7 cosmological models.

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