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Constraints on dark energy parameters from correlations of CMB with LSS
Li H(李虹); Xia JQ(夏俊卿); Li, H; Xia, JQ
2010
发表期刊JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
期号4页码:26
通讯作者[Li, Hong] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; [Li, Hong] Chinese Acad Sci, Theoret Phys Ctr Sci Facil TPCSF, Beijing 100049, Peoples R China ; [Xia, Jun-Qing] Scuola Int Super Studi Avanzati, I-34014 Trieste, Italy
摘要In this paper, we combine the the latest observational data, including the WMAP five-year data (WMAP5), the baryon acoustic oscillations (BAO) and type Ia supernovae (SN) "union" compilation, and use the Markov Chain Monte Carlo method to determine the dark energy parameters. We pay particular attention to the Integrated Sache-Wolfe (ISW) data from the cross-correlations of cosmic microwave background (CMB) and large scale structure (LSS). In the Lambda CDM model, we find that the ISW data, as a complement to the WMAP data, could significantly improve the constraint of curvature Omega(k). We also check the improvement of constraints from the new prior on the Hubble constant and find this new prior could improve the constraint of Omega(k) by a factor of 2. Finally, we study the dynamical evolving EoS of dark energy from the current observational data. Based on the dynamical dark energy model, parameterizing as w(a) = w(0) + w(a)(1-a), we find that the Lambda CDM model remains a good fit to the current data. When taking into account the ISW data, the error bars of w(0) and w(a) could be shrunk slightly. Current constraints on the dynamical dark energy model are not conclusive. The future precision measurements are needed.
文章类型Article
关键词dark energy experiments integrated Sachs-Wolfe effect
学科领域Astronomy & Astrophysics; Physics
研究领域[WOS]Astronomy & Astrophysics ; Physics
DOI10.1088/1475-7516/2010/04/026
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语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000277684600007
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被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240371
专题理论物理室
粒子天体物理中心
作者单位中国科学院高能物理研究所
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Li H,Xia JQ,Li, H,et al. Constraints on dark energy parameters from correlations of CMB with LSS[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2010(4):26.
APA 李虹,夏俊卿,Li, H,&Xia, JQ.(2010).Constraints on dark energy parameters from correlations of CMB with LSS.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(4),26.
MLA 李虹,et al."Constraints on dark energy parameters from correlations of CMB with LSS".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .4(2010):26.
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