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Zhang, Xin; Zhang, X , Northeastern Univ, Coll Sci, Dept Phys, Shenyang 110004, Peoples R China
Holographic Ricci dark energy: Current observational constraints, quintom feature, and the reconstruction of scalar-field dark energy
Source PublicationPHYSICAL REVIEW D
KeywordEquation-of-state Anisotropy-probe Observations Cosmological Constant Statefinder Diagnosis Accelerating Universe Coupled Quintessence Cosmic Coincidence Wmap Observations Infrared Cutoff Model
AbstractIn 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.
2009
ISSN1550-7998
Volume79Issue:10Pages:-
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNational Natural Science Foundation of China[10705041] ; National Natural Science Foundation of China[10705041] ; National Natural Science Foundation of China[10705041] ; National Natural Science Foundation of China[10705041]
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5334
Collection理论物理所科研产出_SCI论文
Corresponding AuthorZhang, X , Northeastern Univ, Coll Sci, Dept Phys, Shenyang 110004, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Xin,Zhang, X , Northeastern Univ, Coll Sci, Dept Phys, Shenyang 110004, Peoples R China. Holographic Ricci dark energy: Current observational constraints, quintom feature, and the reconstruction of scalar-field dark energy[J]. PHYSICAL REVIEW D,2009,79(10):-.
APA Zhang, Xin,&Zhang, X , Northeastern Univ, Coll Sci, Dept Phys, Shenyang 110004, Peoples R China.(2009).Holographic Ricci dark energy: Current observational constraints, quintom feature, and the reconstruction of scalar-field dark energy.PHYSICAL REVIEW D,79(10),-.
MLA Zhang, Xin,et al."Holographic Ricci dark energy: Current observational constraints, quintom feature, and the reconstruction of scalar-field dark energy".PHYSICAL REVIEW D 79.10(2009):-.
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