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题名: Observational constraint on dynamical evolution of dark energy
作者: Gong, Yungui ;  蔡荣根 ;  Chen, Yun ;  Zhu, Zong-Hong
刊名: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
出版日期: 2010
期号: 1, 页码:-
关键词: HUBBLE-SPACE-TELESCOPE ;  COSMOLOGICAL CONSTANT ;  IA SUPERNOVAE ;  1/R GRAVITY ;  REDSHIFT ;  UNIVERSE ;  ACCELERATION ;  MATTER ;  QUINTESSENCE ;  CURVATURE
学科分类: Physics
通讯作者: Gong, YG , Chongqing Univ Posts & Telecommun, Coll Math & Phys, Chongqing 400065, Peoples R China
部门归属: [Gong, YG; Cai, RG] Chongqing Univ Posts & Telecommun, Coll Math & Phys, Chongqing 400065, Peoples R China; [Cai, RG] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China; [Chen, Y; Zhu, ZH] Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
英文摘要: We 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.
资助者: 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]
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000289245200009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5193
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
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):-.
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