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Unified dark energy and dark matter from a scalar field different from quintessence
Gao, Changjun1; Kunz, Martin2,3; Liddle, Andrew R.2; Parkinson, David2
2010-02-15
Source PublicationPHYSICAL REVIEW D
Volume81Issue:4
AbstractWe 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.
DOI10.1103/PhysRevD.81.043520
Indexed BySCI
Language英语
WOS IDWOS:000275898500034
Citation statistics
Cited Times:31[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/7696
Collection星系宇宙学研究部
Affiliation1.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
Recommended Citation
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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