Interacting vectorlike dark energy, the first and second cosmological coincidence problems
文献类型：期刊论文
| 作者 | Cai, RG ; Wei, H; Wei, H , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China
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| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2006 |
| 卷号 | 73期号:8页码:- |
| 关键词 | Digital Sky Survey Equation-of-state Probe Wmap Observations Accelerating Universe Phantom Divide Data Release Constant Model Inflation Gravity |
| ISSN号 | 1550-7998 |
| 英文摘要 | One of the puzzles of the dark energy problem is the (first) cosmological coincidence problem, namely, why does our Universe begin the accelerated expansion recently? Why are we living in an epoch in which the dark energy density and the dust matter energy density are comparable? On the other hand, cosmological observations hint that the equation-of-state parameter (EoS) of dark energy crossed the phantom divide w(de)=-1 in the near past. Many dark energy models whose EoS can cross the phantom divide have been proposed. However, to our knowledge, these models with crossing the phantom divide only provide the possibility that w(de) can cross -1. They do not answer another question, namely, why crossing the phantom divide occurs recently? Since in many existing models whose EoS can cross the phantom divide, w(de) undulates around -1 randomly, why are we living in an epoch w(de)<-1? This can be regarded as the second cosmological coincidence problem. In this work, the cosmological evolution of the vectorlike dark energy interacting with background perfect fluid is investigated. We find that the first and second cosmological coincidence problems can be alleviated at the same time in this scenario. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000237159600004 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/6011]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Wei, H , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cai, RG,Wei, H,Wei, H , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China. Interacting vectorlike dark energy, the first and second cosmological coincidence problems[J]. PHYSICAL REVIEW D,2006,73(8):-. |
| APA | Cai, RG,Wei, H,&Wei, H , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.(2006).Interacting vectorlike dark energy, the first and second cosmological coincidence problems.PHYSICAL REVIEW D,73(8),-. |
| MLA | Cai, RG,et al."Interacting vectorlike dark energy, the first and second cosmological coincidence problems".PHYSICAL REVIEW D 73.8(2006):-. |
入库方式： OAI收割
来源：理论物理研究所
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