Exploring the latest Union2 type Ia supernovae dataset by using model-independent parametrization methods
文献类型：期刊论文
| 作者 | Li, MA
|
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2011 |
| 卷号 | 83期号:2页码:23010 |
| 关键词 | BARYON ACOUSTIC-OSCILLATIONS DARK ENERGY CONSTRAINTS YANG-MILLS CONDENSATE COSMOLOGICAL CONSTANT LIGHT CURVES CONSEQUENCES QUINTESSENCE EVOLUTION EQUATION UNIVERSE |
| ISSN号 | 1550-7998 |
| 通讯作者 | Wang, SA (reprint author), Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Peoples R China. |
| 英文摘要 | We explore the cosmological consequences of the recently released Union2 sample of 557 type Ia supernovae. Combining this latest type Ia supernovae dataset with the cosmic microwave background anisotropy data from the Wilkinson Microwave Anisotropy Probe 7-yr observations and the baryon acoustic oscillation results from the Sloan Digital Sky Survey data release 7, we measure the dark energy density function f(z) equivalent to rho(de)(z)/rho(de)(0) as a free function of redshift. Two model-independent parametrization methods (the binned parametrization and the polynomial interpolation parametrization) are used in this paper. By using the chi(2) statistic and the Bayesian information criterion, we find that the current observational data are still too limited to distinguish which parametrization method is better, and a simple model has the advantage in fitting observational data over a complicated model. Moreover, it is found that all these parametrizations demonstrate that the Union2 dataset is still consistent with a cosmological constant at 1 sigma confidence level. Therefore, the Union2 dataset is different from the Constitution type Ia supernovae dataset, which more favors a dynamical dark energy. |
| 学科主题 | Physics |
| 收录类别 | SCI |
| 资助信息 | NSFC [10535060/A050207, 10821504]; Ministry of Science and Technology 973 program [2007CB815401]; USTC |
| 原文出处 | http://dx.doi.org/10.1103/PhysRevD.83.023010 |
| 语种 | 英语 |
| WOS记录号 | WOS:000286802700004 |
| 公开日期 | 2013-05-17 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/14433]  |
| 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 | Li, MA. Exploring the latest Union2 type Ia supernovae dataset by using model-independent parametrization methods[J]. PHYSICAL REVIEW D,2011,83(2):23010. |
| APA | Li, MA.(2011).Exploring the latest Union2 type Ia supernovae dataset by using model-independent parametrization methods.PHYSICAL REVIEW D,83(2),23010. |
| MLA | Li, MA."Exploring the latest Union2 type Ia supernovae dataset by using model-independent parametrization methods".PHYSICAL REVIEW D 83.2(2011):23010. |
入库方式： OAI收割
来源：理论物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。