Liang, Nan 2010 用伽马暴限制宇宙学的DGP braneworld模型

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Title:		Cosmological Constraints on the DGP braneworld model with Gamma-ray bursts
Authors:		Liang, Nan; Zhu, Zong-Hong
Publication:		eprint arXiv:1010.2681
Publication Date:		10/2010
Origin:		ARXIV
Keywords:		Astrophysics - Cosmology and Extragalactic Astrophysics
Comment:		9 pages, 1 figure, 1 table
Bibliographic Code:		2010arXiv1010.2681L

Abstract

In this paper, we investigate observational constraints on the DGP model with the Gamma-ray bursts (GRBs) at high redshift obtained directly from the Union2 SNe Ia set. With the cosmology-independent GRBs, the Union2 set, as well as the CMB observation from WMAP7 result, the baryon acoustic oscillation, the baryon mass fraction in clusters and the observed $H(z)$ data, we obtain the best-fit values of the DGP model $\{ \Omega_{M0},\Omega_{rc}\} =\{0.235_{-0.014}^{+0.015},0.138_{-0.048}^{+0.051}\}$, which lead to more stringent constraints; with the corresponding $\Omega_{K}=0.033$, which favor a flat universe.

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