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题名: The effect of different observational data on the constraints of cosmological parameters
作者: Gong, YG ;  Gao, Q ;  Zhu, ZH
刊名: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期: 2013
卷号: 430, 期号:4, 页码:3142-3154
关键词: BARYON ACOUSTIC-OSCILLATIONS ;  HUBBLE-SPACE-TELESCOPE ;  SUPERNOVA LEGACY SURVEY ;  DARK ENERGY ;  IA SUPERNOVAE ;  CONSTANT ;  CURVATURE ;  GRAVITY ;  MATTER
学科分类: Physics
通讯作者: Gong, YG (reprint author), Chongqing Univ Posts & Telecommun, Coll Math & Phys, Chongqing 400065, Peoples R China.
部门归属: [Gong, Yungui; Gao, Qing] Chongqing Univ Posts & Telecommun, Coll Math & Phys, Chongqing 400065, Peoples R China; [Gong, Yungui] Huazhong Univ Sci & Technol, Sch Phys, MOE Key Lab Fundamental Quant Measurement, Wuhan 430074, Peoples R China; [Gong, Yungui] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China; [Zhu, Zong-Hong] Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
英文摘要: The constraints on the A cold dark matter (ACDM) model from Type Ia supernova (SNe Ia) data alone and baryon acoustic oscillation (BAO) data alone are similar, so it is worthwhile to compare their constraints on the property of dark energy. We apply the three-year Supernova Legacy Survey (SNLS3) compilation of 472 SNe Ia data, the BAO measurement of distance, the cosmic microwave background radiation data from the seven-year Wilkinson Microwave Anisotropy Probe (WMAP7) and the Hubble parameter data to study the effect of their different combinations on the fittings of cosmological parameters in the modified holographic dark energy model and the Chevallier-Polarski-Linder model. Neither BAO nor WMAP7 data alone give good constraint on the equation of state parameter of dark energy, but both WMAP7 data and BAO data help SNe Ia data break the degeneracies among the model parameters, hence tighten the constraint on the variation of equation of state parameter wa, and WMAP7 data do the job a little better. Although BAO and WMAP7 data provide reasonably good constraints on Omega(m) and Omega(k), it is not able to constrain the dynamics of dark energy. On the other hand, SNe Ia data do not provide good constraints on Omega(m) and Omega(k), but they provide good constraint on the dynamics of dark energy, especially the variation of the equation of state parameter of dark energy, so we need to combine SNe Ia with BAO and WMAP7 data to probe the property of dark energy. The addition of H(z) data helps better constrain the geometry of the Universe Omega(k) and the property of dark energy. For the SNLS SNe Ia data, the nuisance parameters alpha and beta are consistent for all different combinations of the above data, and their impacts on the fittings of cosmological parameters are minimal. By fitting the data to different models, the ACDM model is still consistent with all the observational data.
资助者: National Basic Science Programme (Project 973) of China [2010CB833004, 2012CB821804]; NNSF of China [10935013, 11175270]; Chinese Academy of Sciences [KJCX2.YW.W10]; Fundamental Research Funds for the Central Universities
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000318339700056
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15392
Appears in Collections:理论物理所2013年知识产出 _期刊论文

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Recommended Citation:
Gong, YG,Gao, Q,Zhu, ZH. The effect of different observational data on the constraints of cosmological parameters[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,430(4):3142-3154.
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