Coupled dark energy with perturbed Hubble expansion rate
文献类型：期刊论文
| 作者 | Yang, WQ ; Xu, LX |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2014 |
| 卷号 | 90期号:8页码:83532 |
| 关键词 | OSCILLATION SPECTROSCOPIC SURVEY BARYON ACOUSTIC-OSCILLATIONS INTERACTING QUINTESSENCE REDSHIFT-SPACE GROWTH-RATE MODELS MATTER CONSTRAINTS GALAXIES PERTURBATIONS |
| ISSN号 | 1550-7998 |
| 通讯作者 | Yang, WQ (reprint author), Dalian Univ Technol, Sch Phys & Optoelect Technol, Inst Theoret Phys, Dalian 116024, Peoples R China. |
| 英文摘要 | The coupling between dark sectors provides a possible approach to mitigate the coincidence problem of the cosmological standard model. In this paper, dark energy is treated as a fluid with a constant equation of state, whose coupling with dark matter is proportional the Hubble parameter and energy density of dark energy, that is, (Q) over bar = 3 xi(x)(H) over bar(rho) over bar (x). In particular, we consider the Hubble expansion rate to be perturbed in the perturbation evolutions of dark sectors. Using joint data sets which include cosmic microwave background radiation, baryon acoustic oscillation, type Ia supernovae, and redshift-space distortions, we perform a full Markov chain Monte Carlo likelihood analysis for the coupled model. The results show that the mean value with errors of the interaction rate is xi(x) = 0.00305(-0.00305-0.00305-0.00305)(+0.000645+0.00511+0.00854) for Q(A)(mu)parallel to u(c)(mu) and xi(x) = 0.00317(-0.00317-0.00317-0.00317)(+0.000628+0.00547+0.00929) for Q(A)(mu)parallel to u(x)(mu), which means that the recent cosmic observations favor a small interaction rate which is up to the order of 10(-3). Moreover, in contrast to the coupled model with an unperturbed expansion rate, we find the perturbed Hubble expansion rate can bring about a negligible impact on the model parameter space. |
| 学科主题 | Physics |
| 收录类别 | SCI |
| 资助信息 | NSFC [11275035]; Fundamental Research Funds for the Central Universities [DUT13LK01] |
| 原文出处 | http://dx.doi.org/10.1103/PhysRevD.90.083532 |
| 语种 | 英语 |
| WOS记录号 | WOS:000350215700001 |
| 公开日期 | 2015-06-03 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/15599]  |
| 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 | Yang, WQ,Xu, LX. Coupled dark energy with perturbed Hubble expansion rate[J]. PHYSICAL REVIEW D,2014,90(8):83532. |
| APA | Yang, WQ,&Xu, LX.(2014).Coupled dark energy with perturbed Hubble expansion rate.PHYSICAL REVIEW D,90(8),83532. |
| MLA | Yang, WQ,et al."Coupled dark energy with perturbed Hubble expansion rate".PHYSICAL REVIEW D 90.8(2014):83532. |
入库方式： OAI收割
来源：理论物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。