ITP OpenIR  > 理论物理所2014年知识产出
On the effect of the degeneracy among dark energy parameters
Gong, YG; Gao, Q; Gong, YG (reprint author), Huazhong Univ Sci & Technol, Sch Phys, MOE Key Lab Fundamental Quant Measurement, Wuhan 430074, Hubei, Peoples R China.
2014
发表期刊EUROPEAN PHYSICAL JOURNAL C
ISSN1434-6044
卷号74期号:1页码:2729
摘要The dynamics of scalar fields as dark energy is well approximated by some general relations between the equation of state parameter w(z) and the fractional energy density Of. Based on the approximation, for slowly rolling scalar fields, we derived the analytical expressions of w(z) which reduce to the popular Chevallier-Polarski-Linder parametrization with an explicit degeneracy relation between w(0) and w(a). The models approximate the dynamics of scalar fields well and help eliminate the degeneracies among w(a), w(0), and Omega(m0). With the explicit degeneracy relations, we test their effects on the constraints of the cosmological parameters. We find that: (1) The analytical relations between w(0) and w(a) for the two models are consistent with observational data. (2) The degeneracies have little effect on Omega(m0). (3) The 1 sigma error of w(0) was reduced about 30 % with the degeneracy relations.
部门归属[Gong, Yungui; Gao, Qing] Huazhong Univ Sci & Technol, Sch Phys, MOE Key Lab Fundamental Quant Measurement, Wuhan 430074, Hubei, Peoples R China; [Gong, Yungui] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
关键词Baryon Acoustic-oscillations Equation-of-state Cosmological Constant Cosmic Acceleration Supernova Data Ia Supernovae Constraints Quintessence Universe Model
学科领域Physics
资助者National Basic Science Program (Project 973) of China [2010CB833004]; NNSF of China [10935013, 11175270]; Program for New Century Excellent Talents in University; Fundamental Research Funds for the Central Universities ; National Basic Science Program (Project 973) of China [2010CB833004]; NNSF of China [10935013, 11175270]; Program for New Century Excellent Talents in University; Fundamental Research Funds for the Central Universities ; National Basic Science Program (Project 973) of China [2010CB833004]; NNSF of China [10935013, 11175270]; Program for New Century Excellent Talents in University; Fundamental Research Funds for the Central Universities ; National Basic Science Program (Project 973) of China [2010CB833004]; NNSF of China [10935013, 11175270]; Program for New Century Excellent Talents in University; Fundamental Research Funds for the Central Universities
DOI10.1140/epjc/s10052-014-2729-2
URL查看原文
收录类别SCI
语种英语
资助者National Basic Science Program (Project 973) of China [2010CB833004]; NNSF of China [10935013, 11175270]; Program for New Century Excellent Talents in University; Fundamental Research Funds for the Central Universities ; National Basic Science Program (Project 973) of China [2010CB833004]; NNSF of China [10935013, 11175270]; Program for New Century Excellent Talents in University; Fundamental Research Funds for the Central Universities ; National Basic Science Program (Project 973) of China [2010CB833004]; NNSF of China [10935013, 11175270]; Program for New Century Excellent Talents in University; Fundamental Research Funds for the Central Universities ; National Basic Science Program (Project 973) of China [2010CB833004]; NNSF of China [10935013, 11175270]; Program for New Century Excellent Talents in University; Fundamental Research Funds for the Central Universities
WOS记录号WOS:000330989200001
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/15493
专题理论物理所2014年知识产出
通讯作者Gong, YG (reprint author), Huazhong Univ Sci & Technol, Sch Phys, MOE Key Lab Fundamental Quant Measurement, Wuhan 430074, Hubei, Peoples R China.
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GB/T 7714
Gong, YG,Gao, Q,Gong, YG . On the effect of the degeneracy among dark energy parameters[J]. EUROPEAN PHYSICAL JOURNAL C,2014,74(1):2729.
APA Gong, YG,Gao, Q,&Gong, YG .(2014).On the effect of the degeneracy among dark energy parameters.EUROPEAN PHYSICAL JOURNAL C,74(1),2729.
MLA Gong, YG,et al."On the effect of the degeneracy among dark energy parameters".EUROPEAN PHYSICAL JOURNAL C 74.1(2014):2729.
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