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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
Source PublicationNUCLEAR PHYSICS B
KeywordDark Energy Quantum-gravity Lambda-term Holographic Quintessence Accelerating Universe Coupled Quintessence Vacuum Energy Of-state Consequences Supernovae
AbstractIn 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.
2008
ISSN0550-3213
Volume804Issue:40910Pages:262-285
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNSFC, China[10325525, 90403029, 10525060]; Chinese Academy of Sciences ; NSFC, China[10325525, 90403029, 10525060]; Chinese Academy of Sciences ; NSFC, China[10325525, 90403029, 10525060]; Chinese Academy of Sciences ; NSFC, China[10325525, 90403029, 10525060]; Chinese Academy of Sciences
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Cited Times:26[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5436
Collection理论物理所科研产出_SCI论文
Corresponding AuthorMa, YZ , Chinese Acad Sci, Inst Theoret Phys, KITPC, POB 2735, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
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.
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