中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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
刊名PHYSICAL REVIEW D
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
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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).

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来源:国家天文台

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