中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Variable cosmological constant model: The reconstruction equations and constraints from current observational data

文献类型:期刊论文

作者Ma, Yin-Zhe; Ma, YZ , Chinese Acad Sci, Inst Theoret Phys, KITPC, POB 2735, Beijing 100080, Peoples R China
刊名NUCLEAR PHYSICS B
出版日期2008
卷号804期号:40910页码:262-285
关键词Dark Energy Quantum-gravity Lambda-term Holographic Quintessence Accelerating Universe Coupled Quintessence Vacuum Energy Of-state Consequences Supernovae
ISSN号0550-3213
英文摘要In this paper we first give a brief review of the variable cosmological constant model and its scalar field description. We mainly discuss two types of variable cosmological constant models: a power law and H power law models. A method to obtain all of the equivalent scalar field potentials and the effective equation of state of the two models is presented. In addition, the dynamics of such scalar field potentials and effective equation of state are discussed in detail. The parameters of the two models are constrained by current 307 high-quality "Union" SN Ia data set, baryon acoustic oscillation (BAO) measurement from the Sloan Digital Sky Survey (SDSS), 9 observational H (Z) data derived from the Gemini Deep Deep Survey (GDDS) and the shift parameter of the cosmic microwave background (CMB) given by the three-year Wilkinson Microwave Anisotropy Probe (WMAP) observations. We also calculate and draw the picture of the Hubble parameter, the deceleration parameter and the matter density of the two models. Then, we show that the indices m and n in the two models have specific meaning in determining properties of the models. Moreover, the reasons that indices m and it may also influence the behavior of effective equation of state and scalar field potentials are presented. (C) 2008 Elsevier B.V. All rights reserved.
学科主题Physics
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WOS记录号WOS:000259648900010
公开日期2012-08-02
源URL[http://ir.itp.ac.cn/handle/311006/5436]  
专题理论物理研究所_理论物理所1978-2010年知识产出
通讯作者Ma, YZ , Chinese Acad Sci, Inst Theoret Phys, KITPC, POB 2735, Beijing 100080, Peoples R China
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Ma, Yin-Zhe,Ma, YZ , Chinese Acad Sci, Inst Theoret Phys, KITPC, POB 2735, Beijing 100080, Peoples R China. Variable cosmological constant model: The reconstruction equations and constraints from current observational data[J]. NUCLEAR PHYSICS B,2008,804(40910):262-285.
APA Ma, Yin-Zhe,&Ma, YZ , Chinese Acad Sci, Inst Theoret Phys, KITPC, POB 2735, Beijing 100080, Peoples R China.(2008).Variable cosmological constant model: The reconstruction equations and constraints from current observational data.NUCLEAR PHYSICS B,804(40910),262-285.
MLA Ma, Yin-Zhe,et al."Variable cosmological constant model: The reconstruction equations and constraints from current observational data".NUCLEAR PHYSICS B 804.40910(2008):262-285.

入库方式: OAI收割

来源:理论物理研究所

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