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题名: Variable cosmological constant model: The reconstruction equations and constraints from current observational data
作者: Ma, Yin-Zhe
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
学科分类: Physics
通讯作者: Ma, YZ , Chinese Acad Sci, Inst Theoret Phys, KITPC, POB 2735, Beijing 100080, Peoples R China
部门归属: Chinese Acad Sci, Inst Theoret Phys, KITPC, Beijing 100080, Peoples R China
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.
资助者: NSFC, China[10325525, 90403029, 10525060]; Chinese Academy of Sciences
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000259648900010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5436
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Ma, Yin-Zhe. Variable cosmological constant model: The reconstruction equations and constraints from current observational data[J]. NUCLEAR PHYSICS B,2008,804(40910):262-285.
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