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Gong, Yungui; Cai, Rong-Gen; Chen, Yun; Zhu, Zong-Hong; Gong, YG , Chongqing Univ Posts & Telecommun, Coll Math & Phys, Chongqing 400065, Peoples R China
Observational constraint on dynamical evolution of dark energy
Source PublicationJOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
KeywordHubble-space-telescope Cosmological Constant Ia Supernovae 1/r Gravity Redshift Universe Acceleration Matter Quintessence Curvature
AbstractWe use the Constitution supernova, the baryon acoustic oscillation, the cosmic microwave background, and the Hubble parameter data to analyze the evolution property of dark energy. We obtain different results when we fit different baryon acoustic oscillation data combined with the Constitution supernova data to the Chevallier-Polarski-Linder model. We find that the difference stems from the different values of Omega(m0). We also fit the observational data to the model independent piecewise constant parametrization. Four redshift bins with boundaries at z = 0.22, 0.53, 0.85 and 1.8 were chosen for the piecewise constant parametrization of the equation of state parameter w(z) of dark energy. We find no significant evidence for evolving w(z). With the addition of the Hubble parameter, the constraint on the equation of state parameter at high redshift is improved by 70%. The marginalization of the nuisance parameter connected to the supernova distance modulus is discussed.
2010
ISSN1475-7516
Issue1Pages:-
Subject AreaPhysics
Indexed BySCI
Funding OrganizationChinese Academy of Sciences[KJCX3-SYW-N2]; National Natural Science Foundation of China[10533010, 10935013, 10825313]; Ministry of Science and Technology of China[2007CB815401, 2010CB833004]; Natural Science Foundation[2009BA4050] ; Chinese Academy of Sciences[KJCX3-SYW-N2]; National Natural Science Foundation of China[10533010, 10935013, 10825313]; Ministry of Science and Technology of China[2007CB815401, 2010CB833004]; Natural Science Foundation[2009BA4050] ; Chinese Academy of Sciences[KJCX3-SYW-N2]; National Natural Science Foundation of China[10533010, 10935013, 10825313]; Ministry of Science and Technology of China[2007CB815401, 2010CB833004]; Natural Science Foundation[2009BA4050] ; Chinese Academy of Sciences[KJCX3-SYW-N2]; National Natural Science Foundation of China[10533010, 10935013, 10825313]; Ministry of Science and Technology of China[2007CB815401, 2010CB833004]; Natural Science Foundation[2009BA4050]
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Cited Times:20[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5193
CollectionSCI期刊论文
Corresponding AuthorGong, YG , Chongqing Univ Posts & Telecommun, Coll Math & Phys, Chongqing 400065, Peoples R China
Recommended Citation
GB/T 7714
Gong, Yungui,Cai, Rong-Gen,Chen, Yun,et al. Observational constraint on dynamical evolution of dark energy[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2010(1):-.
APA Gong, Yungui,Cai, Rong-Gen,Chen, Yun,Zhu, Zong-Hong,&Gong, YG , Chongqing Univ Posts & Telecommun, Coll Math & Phys, Chongqing 400065, Peoples R China.(2010).Observational constraint on dynamical evolution of dark energy.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(1),-.
MLA Gong, Yungui,et al."Observational constraint on dynamical evolution of dark energy".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .1(2010):-.
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