Constraints on Dark Energy Models Including Gamma Ray Bursts

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dc.creatorLi, Hong
dc.creatorSu, Meng
dc.creatorFan, Zuhui
dc.creatorDai, Zigao
dc.creatorZhang, Xinmin
dc.date2006-12-03
dc.date2007-11-12
dc.date.accessioned2026-07-07T11:00:21Z
dc.date.available2026-07-07T11:00:21Z
dc.descriptionIn this paper we analyze the constraints on the property of dark energy from cosmological observations. Together with SNe Ia Gold sample, WMAP, SDSS and 2dFGRS data, we include 69 long Gamma-Ray Bursts (GRBs) data in our study and perform global fitting using Markov Chain Monte Carlo (MCMC) technique. Dark energy perturbations are explicitly considered. We pay particular attention to the time evolution of the equation of state of dark energy parameterized as $w_{DE}=w_0+w_a(1-a)$ with $a$ the scale factor of the universe, emphasizing the complementarity of high redshift GRBs to other cosmological probes. It is found that the constraints on dark energy become stringent by taking into account high redshift GRBs, especially for $w_a$, which delineates the evolution of dark energy.
dc.description7 pages and 3 figures. Replaced with version accepted for publication in Phys. Lett. B
dc.identifierhttps://arxiv.org/abs/astro-ph/0612060
dc.identifierhttp://arxiv.org/abs/astro-ph/0612060
dc.identifierPhys.Lett.B658:95-100,2008
dc.identifierdoi:10.1016/j.physletb.2007.10.053
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/187661
dc.subjectAstrophysics
dc.titleConstraints on Dark Energy Models Including Gamma Ray Bursts
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