More evidence for the red-shift dependence of colour from the Joint Light-curve Analysis supernova sample using red-shift tomography
文献类型：期刊论文
| 作者 | Li, M ; Li, N; Wang, S; Zhou, LJ; Li, M (reprint author), Sun Yat Sen Univ, Sch Astron & Space Sci, Guangzhou 510275, Guangdong, Peoples R China.
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2016 |
| 卷号 | 460期号:3页码:2586-2592 |
| 关键词 | Supernovae General Cosmological Parameters Cosmology: Observations Dark Energy |
| DOI | http://dx.doi.org/10.1093/mnras/stw1063 |
| 英文摘要 | In this work, by applying the red-shift tomography method to the Joint Light-curve Analysis (JLA) supernova sample, we explore the possible red-shift dependence of the stretch luminosity alpha and the colour luminosity beta. The basic idea is to divide the JLA sample into different red-shift bins, assuming that alpha and beta are piecewise constants. Then, by constraining the I > CDM model, we check the consistency of the cosmology-fitting results given by the supernova sample of each red-shift bin. We also adopt the same technique to explore the possible evolution of beta in various subsamples of JLA. Using the full JLA data, we find that alpha is always consistent with a constant value. In contrast, at high red shift, beta has a significant trend of decreasing, at similar to 3.5 sigma confidence level (CL). Moreover, we find that the low-z subsample favours a constant beta; in contrast, the Sloan Digital Sky Survey and Supernova Legacy Survey subsamples favour a decreasing beta at 2 sigma and 3.3 sigma CL, respectively. Besides, by using a binned parametrization of beta, we study the impact of the evolution of beta on parameter estimation. We find that compared with a constant beta, a varying beta yields a larger best-fitting value of fractional matter density Omega(m0), which slightly deviates from the best-fitting result given by other cosmological observations. However, for both the varying beta and the constant beta cases, the 1 sigma regions of Omega(m0) are still consistent with the result given by other observations. |
| 学科主题 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/21560]  |
| 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 | Li, M (reprint author), Sun Yat Sen Univ, Sch Astron & Space Sci, Guangzhou 510275, Guangdong, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Li, M,Li, N,Wang, S,et al. More evidence for the red-shift dependence of colour from the Joint Light-curve Analysis supernova sample using red-shift tomography[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,460(3):2586-2592. |
| APA | Li, M,Li, N,Wang, S,Zhou, LJ,&Li, M .(2016).More evidence for the red-shift dependence of colour from the Joint Light-curve Analysis supernova sample using red-shift tomography.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,460(3),2586-2592. |
| MLA | Li, M,et al."More evidence for the red-shift dependence of colour from the Joint Light-curve Analysis supernova sample using red-shift tomography".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 460.3(2016):2586-2592. |
入库方式： OAI收割
来源：理论物理研究所
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