Constraining the dark fluid
文献类型：期刊论文
| 作者 | Kunz, Martin1; Liddle, Andrew R.1,3; Parkinson, David1; Gao, Changjun2
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| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2009-10-01 |
| 卷号 | 80期号:8 |
| 英文摘要 | Cosmological observations are normally fit under the assumption that the dark sector can be decomposed into dark matter and dark energy components. However, as long as the probes remain purely gravitational, there is no unique decomposition and observations can only constrain a single dark fluid; this is known as the dark degeneracy. We use observations to directly constrain this dark fluid in a model-independent way, demonstrating, in particular, that the data cannot be fit by a dark fluid with a single constant equation of state. Parametrizing the dark fluid equation of state by a variety of polynomials in the scale factor a, we use current kinematical data to constrain the parameters. While the simplest interpretation of the dark fluid remains that it is comprised of separate dark matter and cosmological constant contributions, our results cover other model types including unified dark energy/matter scenarios. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000271353700048 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7964]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Univ Sussex, Ctr Astron, Brighton BN1 9QH, E Sussex, England 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 3.Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA |
| 推荐引用方式 GB/T 7714 | Kunz, Martin,Liddle, Andrew R.,Parkinson, David,et al. Constraining the dark fluid[J]. PHYSICAL REVIEW D,2009,80(8). |
| APA | Kunz, Martin,Liddle, Andrew R.,Parkinson, David,&Gao, Changjun.(2009).Constraining the dark fluid.PHYSICAL REVIEW D,80(8). |
| MLA | Kunz, Martin,et al."Constraining the dark fluid".PHYSICAL REVIEW D 80.8(2009). |
入库方式： OAI收割
来源：国家天文台
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