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Huang, ZP; Wu, YL
COSMOLOGICAL CONSTRAINT AND ANALYSIS ON HOLOGRAPHIC DARK ENERGY MODEL CHARACTERIZED BY THE CONFORMAL-AGE-LIKE LENGTH
Source PublicationINTERNATIONAL JOURNAL OF MODERN PHYSICS A
Language英语
KeywordKarolyhazy Uncertainty Relation Probe Wmap Observations Equation-of-state Space-time Infrared Cutoff Constant Universe Supernovae Transition Inflation
AbstractWe present a best-fit analysis on the single-parameter holographic dark energy model characterized by the conformal-age-like length, L = 1/a(4)(t) integral(t)(0) dt' a(3)(t'). Based on the Union2 compilation of 557 supernova Ia (SNIa) data, the baryon acoustic oscillation (BAO) results from the Sloan Digital Sky Survey data release 7 (SDSS DR7) and the cosmic microwave background radiation (CMB) data from the 7-year Wilkinson Microwave Anisotropy Probe (WMAP7), we show that the model gives the minimal chi(2)(min) = 546.273, which is comparable to chi(2)(Lambda CDM) = 544.616 for the Lambda CDM model. The single parameter d concerned in the model is found to be d = 0.232 +/- 0.006 +/- 0.009. Since the fractional density of dark energy Omega(de) similar to d(2)a(2) at a << 1, the fraction of dark energy is naturally negligible in the early universe, Omega(de) << 1 at a << 1. The resulting constraints on the present fractional energy density of matter and the equation of state are Omega(m0) = 0.286(-0.018-0.028)(+0.019+0.032) and w(de0) = -1.240(-0.027-0.044)(+0.027+0.045) respectively. We also provide a systematic analysis on the cosmic evolutions of the fractional energy density of dark energy, the equation of state of dark energy, the deceleration parameter and the statefinder. It is noticed that the equation of state crosses from w(de) > -1 to w(de) < -1, the universe transits from decelerated expansion (q > 0) to accelerated expansion (q < 0) recently, and the statefinder may serve as a sensitive diagnostic to distinguish the CHDE model with the Lambda CDM model.
2012
ISSN0217-751X
Volume27Issue:22Pages:1250130
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNational Basic Research Program of China (973 Program) [2010CB833000]; National Nature Science Foundation of China (NSFC) [10975170, 10975184, 10947016] ; National Basic Research Program of China (973 Program) [2010CB833000]; National Nature Science Foundation of China (NSFC) [10975170, 10975184, 10947016] ; National Basic Research Program of China (973 Program) [2010CB833000]; National Nature Science Foundation of China (NSFC) [10975170, 10975184, 10947016] ; National Basic Research Program of China (973 Program) [2010CB833000]; National Nature Science Foundation of China (NSFC) [10975170, 10975184, 10947016]
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/15031
Collection理论物理所科研产出_SCI论文
Recommended Citation
GB/T 7714
Huang, ZP,Wu, YL. COSMOLOGICAL CONSTRAINT AND ANALYSIS ON HOLOGRAPHIC DARK ENERGY MODEL CHARACTERIZED BY THE CONFORMAL-AGE-LIKE LENGTH[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS A,2012,27(22):1250130.
APA Huang, ZP,&Wu, YL.(2012).COSMOLOGICAL CONSTRAINT AND ANALYSIS ON HOLOGRAPHIC DARK ENERGY MODEL CHARACTERIZED BY THE CONFORMAL-AGE-LIKE LENGTH.INTERNATIONAL JOURNAL OF MODERN PHYSICS A,27(22),1250130.
MLA Huang, ZP,et al."COSMOLOGICAL CONSTRAINT AND ANALYSIS ON HOLOGRAPHIC DARK ENERGY MODEL CHARACTERIZED BY THE CONFORMAL-AGE-LIKE LENGTH".INTERNATIONAL JOURNAL OF MODERN PHYSICS A 27.22(2012):1250130.
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