New limits on coupled dark energy from Planck
文献类型：期刊论文
| 作者 | Xia JQ(夏俊卿) ; Xia, JQ
|
| 刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
 |
| 出版日期 | 2013 |
| 期号 | 11页码:22 |
| 关键词 | modified gravity cosmological parameters from CMBR dark energy theory |
| 英文摘要 | Recently, the Planck collaboration has released the first cosmological papers providing the high resolution, full sky, maps of the cosmic microwave background (CMB) temperature anisotropies. It is crucial to understand that whether the accelerating expansion of our universe at present is driven by an unknown energy component (Dark Energy) or a modification to general relativity (Modified Gravity). In this paper we study the coupled dark energy models, in which the quintessence scalar field nontrivially couples to the cold dark matter, with the strength parameter of interaction beta. Using the Planck data alone, we obtain that the strength of interaction between dark sectors is constrained as beta < 0.102 at 95% confidence level, which is tighter than that from the WMAP9 data alone. Combining the Planck data with other probes, like the Baryon Acoustic Oscillation (BAO), Type-Ia supernovae "Union2.1 compilation" and the CMB lensing data from Planck measurement, we find the tight constraint on the strength of interaction beta < 0.052 (95% C.L.). Interestingly, we also find a non-zero coupling beta = 0.078 +/- 0.022 (68% C.L.) when we use the Planck, the "SNLS" supernovae samples, and the prior on the Hubble constant from the Hubble Space Telescope (HST) together. This evidence for the coupled dark energy models mainly comes from a tension between constraints on the Hubble constant from the Planck measurement and the local direct H-o probes from HST. |
| 学科主题 | Astronomy & Astrophysics; Physics |
| 收录类别 | SCI |
| WOS记录号 | WOS:000327843900023 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/224387]  |
| 专题 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Xia JQ,Xia, JQ. New limits on coupled dark energy from Planck[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2013(11):22. |
| APA | 夏俊卿,&Xia, JQ.(2013).New limits on coupled dark energy from Planck.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(11),22. |
| MLA | 夏俊卿,et al."New limits on coupled dark energy from Planck".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .11(2013):22. |
入库方式： OAI收割
来源：高能物理研究所
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