Unified dark energy and dark matter from a scalar field different from quintessence
文献类型：期刊论文
| 作者 | Gao, Changjun1 ; Kunz, Martin2,3; Liddle, Andrew R.2; Parkinson, David2
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| 刊名 | PHYSICAL REVIEW D
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| 出版日期 | 2010-02-15 |
| 卷号 | 81期号:4 |
| 英文摘要 | We explore unification of dark matter and dark energy in a theory containing a scalar field of non-Lagrangian type, obtained by direct insertion of a kinetic term into the energy-momentum tensor. This scalar is different from quintessence, having an equation of state between -1 and 0 and a zero sound speed in its rest frame. We solve the equations of motion for an exponential potential via a rewriting as an autonomous system, and demonstrate the observational viability of the scenario, for sufficiently small exponential potential parameter lambda, by comparison to a compilation of kinematical cosmological data. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000275898500034 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7696]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Sussex, Ctr Astron, Brighton BN1 9QH, E Sussex, England 3.Univ Geneva, Dept Phys Theor, CH-1211 Geneva 4, Switzerland |
| 推荐引用方式 GB/T 7714 | Gao, Changjun,Kunz, Martin,Liddle, Andrew R.,et al. Unified dark energy and dark matter from a scalar field different from quintessence[J]. PHYSICAL REVIEW D,2010,81(4). |
| APA | Gao, Changjun,Kunz, Martin,Liddle, Andrew R.,&Parkinson, David.(2010).Unified dark energy and dark matter from a scalar field different from quintessence.PHYSICAL REVIEW D,81(4). |
| MLA | Gao, Changjun,et al."Unified dark energy and dark matter from a scalar field different from quintessence".PHYSICAL REVIEW D 81.4(2010). |
入库方式： OAI收割
来源：国家天文台
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