Observational constraint on dynamical evolution of dark energy
文献类型：期刊论文
| 作者 | Cai, Rong-Gen ; Chen, Yun; Zhu, Zong-Hong; Gong, Yungui; Gong, YG , Chongqing Univ Posts & Telecommun, Coll Math & Phys, Chongqing 400065, Peoples R China
|
| 刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
 |
| 出版日期 | 2010 |
| 期号 | 1页码:- |
| 关键词 | Hubble-space-telescope Cosmological Constant Ia Supernovae 1/r Gravity Redshift Universe Acceleration Matter Quintessence Curvature |
| ISSN号 | 1475-7516 |
| 英文摘要 | We use the Constitution supernova, the baryon acoustic oscillation, the cosmic microwave background, and the Hubble parameter data to analyze the evolution property of dark energy. We obtain different results when we fit different baryon acoustic oscillation data combined with the Constitution supernova data to the Chevallier-Polarski-Linder model. We find that the difference stems from the different values of Omega(m0). We also fit the observational data to the model independent piecewise constant parametrization. Four redshift bins with boundaries at z = 0.22, 0.53, 0.85 and 1.8 were chosen for the piecewise constant parametrization of the equation of state parameter w(z) of dark energy. We find no significant evidence for evolving w(z). With the addition of the Hubble parameter, the constraint on the equation of state parameter at high redshift is improved by 70%. The marginalization of the nuisance parameter connected to the supernova distance modulus is discussed. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000289245200009 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5193]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Gong, YG , Chongqing Univ Posts & Telecommun, Coll Math & Phys, Chongqing 400065, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cai, Rong-Gen,Chen, Yun,Zhu, Zong-Hong,et al. Observational constraint on dynamical evolution of dark energy[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2010(1):-. |
| APA | Cai, Rong-Gen,Chen, Yun,Zhu, Zong-Hong,Gong, Yungui,&Gong, YG , Chongqing Univ Posts & Telecommun, Coll Math & Phys, Chongqing 400065, Peoples R China.(2010).Observational constraint on dynamical evolution of dark energy.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(1),-. |
| MLA | Cai, Rong-Gen,et al."Observational constraint on dynamical evolution of dark energy".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .1(2010):-. |
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。