Cosmological constraints on the new holographic dark energy model with action principle

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	Cosmological constraints on the new holographic dark energy model with action principle
	Li, M
刊名	PHYSICAL REVIEW D
	2013
卷号	88 期号:2 页码:23503
关键词	BARYON ACOUSTIC-OSCILLATIONS HUBBLE-SPACE-TELESCOPE BLACK-HOLES ACCELERATING UNIVERSE POWER SPECTRUM DATA RELEASE CONSTANT ENTROPY THERMODYNAMICS QUINTESSENCE
ISSN号	1550-7998
通讯作者	Li, M (reprint author), Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China.
英文摘要	Recently, a new holographic dark energy (HDE) model with action principle was proposed [M. Li and R. X. Miao, arXiv:1210.0966]. It is the first time that the HDE model is derived from the action principle. This model completely solves the causality and circular problems in the original HDE model and automatically gives rise to a dark radiation component. Thus, it is worth investigating such an interesting model by confronting it with the current cosmological observations, so that we can check whether the model is consistent with the data and determine the regions of parameter space allowed. These issues are explored in this work. First, we investigate the dynamical behaviors and the cosmic expansion history of the model and discuss how they are related with the model parameter c. Then, we fit the model to a combination of the present Union2.1 + BAO + CMB + H-0 data. We find the model yields chi(2)(min) = 548: 798 (in a nonflat universe), comparable to the results of the original HDE model (549.461) and the concordant Lambda CDM model (550.354). At 95.4% C. L., we get 1.41 < c < 3.09 and correspondingly -2.25 < w(z = -1) < -1.39, implying the big-rip fate of the Universe at a high confidence level. Besides, for the constraints on dark radiation, we also get a rough estimation N-eff = 3.54(-0.45-0.76)(+0.32+0.67), with the central value slightly larger than the standard value 3.046.
学科主题	Physics
收录类别	SCI
资助信息	NSFC [10535060/A050207, 10975172, 10821504]
原文出处	http://dx.doi.org/10.1103/PhysRevD.88.023503
语种	英语
WOS记录号	WOS:000321125500003
公开日期	2014-04-25
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15337]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Li, M. Cosmological constraints on the new holographic dark energy model with action principle[J]. PHYSICAL REVIEW D,2013,88(2):23503.
APA	Li, M.(2013).Cosmological constraints on the new holographic dark energy model with action principle.PHYSICAL REVIEW D,88(2),23503.
MLA	Li, M."Cosmological constraints on the new holographic dark energy model with action principle".PHYSICAL REVIEW D 88.2(2013):23503.