COSMOLOGICAL CONSTRAINT AND ANALYSIS ON HOLOGRAPHIC DARK ENERGY MODEL CHARACTERIZED BY THE CONFORMAL-AGE-LIKE LENGTH
文献类型：期刊论文
| 作者 | Wu, YL
|
| 刊名 | INTERNATIONAL JOURNAL OF MODERN PHYSICS A
 |
| 出版日期 | 2012 |
| 卷号 | 27期号:22页码:1250130 |
| 关键词 | KAROLYHAZY UNCERTAINTY RELATION PROBE WMAP OBSERVATIONS EQUATION-OF-STATE SPACE-TIME INFRARED CUTOFF CONSTANT UNIVERSE SUPERNOVAE TRANSITION INFLATION |
| ISSN号 | 0217-751X |
| 英文摘要 | We 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. |
| 学科主题 | Physics |
| 收录类别 | SCI |
| 资助信息 | National Basic Research Program of China (973 Program) [2010CB833000]; National Nature Science Foundation of China (NSFC) [10975170, 10975184, 10947016] |
| 原文出处 | http://dx.doi.org/10.1142/S0217751X12501308 |
| 语种 | 英语 |
| WOS记录号 | WOS:000308228700013 |
| 公开日期 | 2014-04-25 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/15031]  |
| 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 | 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 | 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 | Wu, YL."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. |
入库方式： OAI收割
来源：理论物理研究所
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