Cosmological constraint on Brans-Dicke Model
文献类型：期刊论文
| 作者 | Li, Ji-Xia1,2 ; Wu, Feng-Quan1; Li, Yi-Chao1; Gong, Yan1; Chen, Xue-Lei1,3; Li Yichao; Chen Xuelei; Gong Yan; Wu Fengquan; Li Jixia
|
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2015-12-01 |
| 卷号 | 15期号:12页码:2151-2163 |
| 关键词 | cosmology: supernovae Brans-Dicke standard-candle BAO |
| 英文摘要 | We combine new Cosmic Microwave Background (CMB) data from Planck with Baryon Acoustic Oscillation (BAO) data to constrain the Brans-Dicke (BD) theory, in which the gravitational constant G evolves with time. Observations of type Ia supernovae (SNeIa) provide another important set of cosmological data, as they may be regarded as standard candles after some empirical corrections. However, in theories that include modified gravity like the BD theory, there is some risk and complication when using the SNIa data because their luminosity may depend on G. In this paper, we assume a power law relation between the SNIa luminosity and G, but treat the power index as a free parameter. We then test whether the difference in distances measured with SNIa data and BAO data can be reduced in such a model. We also constrain the BD theory and cosmological parameters by making a global fit with the CMB, BAO and SNla data set. For the CMB+BAO+SNIa data set, we find 0.08 x 10(-2) < zeta < 0.33 x 10(-2) at the 68% confidence level (CL) and -0.01 x 10(-2) < zeta < 0.43 x 10(-2) at the 95% CL, where zeta is related to the BD parameter omega by zeta = ln(1 + 1/omega). |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000367563300003 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5459]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Ji-Xia,Wu, Feng-Quan,Li, Yi-Chao,et al. Cosmological constraint on Brans-Dicke Model[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2015,15(12):2151-2163. |
| APA | Li, Ji-Xia.,Wu, Feng-Quan.,Li, Yi-Chao.,Gong, Yan.,Chen, Xue-Lei.,...&Li Jixia.(2015).Cosmological constraint on Brans-Dicke Model.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,15(12),2151-2163. |
| MLA | Li, Ji-Xia,et al."Cosmological constraint on Brans-Dicke Model".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 15.12(2015):2151-2163. |
入库方式： OAI收割
来源：国家天文台
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。