The effect of different observational data on the constraints of cosmological parameters
文献类型：期刊论文
| 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 |
| ISSN号 | 0035-8711 |
| 通讯作者 | Gong, YG (reprint author), Chongqing Univ Posts & Telecommun, Coll Math & Phys, Chongqing 400065, 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. |
| 学科主题 | Physics |
| 收录类别 | SCI |
| 资助信息 | 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 |
| 原文出处 | http://dx.doi.org/10.1093/mnras/stt120 |
| 语种 | 英语 |
| WOS记录号 | WOS:000318339700056 |
| 公开日期 | 2014-04-25 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/15392]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 GB/T 7714 | 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. |
| APA | Gong, YG,Gao, Q,&Zhu, ZH.(2013).The effect of different observational data on the constraints of cosmological parameters.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,430(4),3142-3154. |
| MLA | Gong, YG,et al."The effect of different observational data on the constraints of cosmological parameters".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 430.4(2013):3142-3154. |
入库方式： OAI收割
来源：理论物理研究所
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