Examining the Evidence for Dynamical Dark Energy

	Examining the Evidence for Dynamical Dark Energy
	Zhao, GB; Crittenden, RG; Pogosian, L; Zhang, XM;张新民
刊名	PHYSICAL REVIEW LETTERS
	2012
卷号	109 期号:17 页码:171301
英文摘要	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.
学科主题	Physics
收录类别	SCI
WOS记录号	WOS:000310261200003
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224660]
专题	高能物理研究所_理论物理室
推荐引用方式 GB/T 7714	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.