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题名: Holographic Ricci dark energy: Current observational constraints, quintom feature, and the reconstruction of scalar-field dark energy
作者: Zhang, Xin
刊名: PHYSICAL REVIEW D
出版日期: 2009
卷号: 79, 期号:10, 页码:-
关键词: EQUATION-OF-STATE ;  ANISOTROPY-PROBE OBSERVATIONS ;  COSMOLOGICAL CONSTANT ;  STATEFINDER DIAGNOSIS ;  ACCELERATING UNIVERSE ;  COUPLED QUINTESSENCE ;  COSMIC COINCIDENCE ;  WMAP OBSERVATIONS ;  INFRARED CUTOFF ;  MODEL
学科分类: Physics
通讯作者: Zhang, X , Northeastern Univ, Coll Sci, Dept Phys, Shenyang 110004, Peoples R China
部门归属: [Zhang, X] Northeastern Univ, Coll Sci, Dept Phys, Shenyang 110004, Peoples R China; [Zhang, X] Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100080, Peoples R China
英文摘要: In this work, we consider the cosmological constraints on the holographic Ricci dark energy proposed by Gao et al. [Phys. Rev. D 79, 043511 (2009)], by using the observational data currently available. The main characteristic of holographic Ricci dark energy is governed by a positive numerical parameter alpha in the model. When alpha < 1/2, the holographic Ricci dark energy will exhibit a quintomlike behavior; i.e., its equation of state will evolve across the cosmological-constant boundary w=-1. The parameter alpha can be determined only by observations. Thus, in order to characterize the evolving feature of dark energy and to predict the fate of the Universe, it is of extraordinary importance to constrain the parameter alpha by using the observational data. In this paper, we derive constraints on the holographic Ricci dark energy model from the latest observational data including the Union sample of 307 type Ia supernovae, the shift parameter of the cosmic microwave background given by the five-year Wilkinson Microwave Anisotropy Probe observations, and the baryon acoustic oscillation measurement from the Sloan Digital Sky Survey. The joint analysis gives the best-fit results (with 1 sigma uncertainty): alpha=0.359(-0.025)(+0.024) and Omega(m0)=0.318(-0.024)(+0.026). That is to say, according to the observations, the holographic Ricci dark energy takes on the quintom feature. Finally, in light of the results of the cosmological constraints, we discuss the issue of the scalar-field dark energy reconstruction, based on the scenario of the holographic Ricci vacuum energy.
资助者: National Natural Science Foundation of China[10705041]
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000266501900029
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5334
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Zhang, Xin. Holographic Ricci dark energy: Current observational constraints, quintom feature, and the reconstruction of scalar-field dark energy[J]. PHYSICAL REVIEW D,2009,79(10):-.
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