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Examining the Evidence for Dynamical Dark Energy
Zhao, GB; Crittenden, RG; Pogosian, L; Zhang, XM;张新民
2012
发表期刊PHYSICAL REVIEW LETTERS
卷号109期号:17页码:171301
摘要We apply a new nonparametric Bayesian method for reconstructing the evolution history of the equation of state w of dark energy, based on applying a correlated prior for w(z), to a collection of cosmological data. We combine the latest supernova (SNLS 3 year or Union 2.1), cosmic microwave background, redshift space distortion, and the baryonic acoustic oscillation measurements (including BOSS, WiggleZ, and 6dF) and find that the cosmological constant appears consistent with current data, but that a dynamical dark energy model which evolves from w < -1 at z similar to 0.25 to w > -1 at higher redshift is mildly favored. Estimates of the Bayesian evidence show little preference between the cosmological constant model and the dynamical model for a range of correlated prior choices. Looking towards future data, we find that the best fit models for current data could be well distinguished from the Lambda CDM model by observations such as Planck and Euclid-like surveys.
学科领域Physics
DOI10.1103/PhysRevLett.109.171301
收录类别SCI
WOS记录号WOS:000310261200003
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被引频次:58[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/311005/224660
专题理论物理室
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Zhao, GB,Crittenden, RG,Pogosian, L,et al. Examining the Evidence for Dynamical Dark Energy[J]. PHYSICAL REVIEW LETTERS,2012,109(17):171301.
APA Zhao, GB,Crittenden, RG,Pogosian, L,&Zhang, XM;张新民.(2012).Examining the Evidence for Dynamical Dark Energy.PHYSICAL REVIEW LETTERS,109(17),171301.
MLA Zhao, GB,et al."Examining the Evidence for Dynamical Dark Energy".PHYSICAL REVIEW LETTERS 109.17(2012):171301.
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