The XMM Cluster Survey: testing chameleon gravity using the profiles of clusters
文献类型：期刊论文
| 作者 | Wilcox, Harry1; Bacon, David1; Nichol, Robert C.1; Rooney, Philip J.2; Terukina, Ayumu3; Romer, A. Kathy2; Koyama, Kazuya1; Zhao, Gong-Bo1,4 ; Hood, Ross5; Mann, Robert G.5
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2015-09-11 |
| 卷号 | 452期号:2页码:1171-1183 |
| 关键词 | gravitation gravitational lensing: weak X-rays: galaxies: clusters |
| 英文摘要 | The chameleon gravity model postulates the existence of a scalar field that couples with matter to mediate a fifth force. If it exists, this fifth force would influence the hot X-ray emitting gas filling the potential wells of galaxy clusters. However, it would not influence the clusters weak lensing signal. Therefore, by comparing X-ray and weak lensing profiles, one can place upper limits on the strength of a fifth force. This technique has been attempted before using a single, nearby cluster (Coma, z = 0.02). Here we apply the technique to the stacked profiles of 58 clusters at higher redshifts (0.1 < z < 1.2), including 12 new to the literature, using X-ray data from the XMM Cluster Survey and weak lensing data from the Canada-France-Hawaii-Telescope Lensing Survey. Using a multiparameter Markov chain Monte Carlo analysis, we constrain the two chameleon gravity parameters (beta and phi(infinity)). Our fits are consistent with general relativity, not requiring a fifth force. In the special case of f(R) gravity (where beta = root 1/6), we set an upper limit on the background field amplitude today of |f(R0)| < 6 x 10(-5) (95 per cent CL). This is one of the strongest constraints to date on |f(R0)| on cosmological scales. We hope to improve this constraint in future by extending the study to hundreds of clusters using data from the Dark Energy Survey. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000360851900007 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5586]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England 2.Univ Sussex, Ctr Astron, Brighton BN1 9QH, E Sussex, England 3.Hiroshima Univ, Dept Phys Sci, Higashihiroshima 7398526, Japan 4.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 5.Univ Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland 6.Univ KwaZulu Natal, Sch Math Stat & Comp Sci, Astrophys & Cosmol Res Unit, ZA-4041 Durban, South Africa 7.Univ Oxford, Dept Phys, BIPAC, Oxford OX1 3RH, England 8.Liverpool John Moores Univ, Astrophys Res Inst, Liverpool L5 3AF, Merseyside, England 9.Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamenta, College Stn, TX 77843 USA 10.Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA |
| 推荐引用方式 GB/T 7714 | Wilcox, Harry,Bacon, David,Nichol, Robert C.,et al. The XMM Cluster Survey: testing chameleon gravity using the profiles of clusters[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,452(2):1171-1183. |
| APA | Wilcox, Harry.,Bacon, David.,Nichol, Robert C..,Rooney, Philip J..,Terukina, Ayumu.,...&Viana, Pedro T. P..(2015).The XMM Cluster Survey: testing chameleon gravity using the profiles of clusters.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,452(2),1171-1183. |
| MLA | Wilcox, Harry,et al."The XMM Cluster Survey: testing chameleon gravity using the profiles of clusters".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 452.2(2015):1171-1183. |
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