Testing gravity with non-Gaussianity
文献类型：期刊论文
| 作者 | Gao, X |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2011 |
| 卷号 | 702期号:4页码:197-200 |
| 关键词 | GRAVITATIONAL PERTURBATIONS EVOLUTION |
| ISSN号 | 0370-2693 |
| 通讯作者 | Gao, X (reprint author), Univ Paris 07, CNRS, APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France. |
| 英文摘要 | We show that modified gravity presents distinctive nonlinear features on the Cosmic Microwave Background (CMB) anisotropies comparing with General Relativity (GR). We calculate the contribution to the CMB non-Gaussianity from nonlinear Sachs-Wolfe effect in f (R) gravity and show that, contrary to GR's contribution which is typically less than or similar to O(1), the contribution in f (R) gravity is sensitive to the nonlinear structure of f (R) and can be large in principle. Optimistically, this gives an alternative origin for the possibly observed large CMB non-Gaussianities besides the primordial ones. On the other hand, such nonlinear features can be employed to provide a new cosmological test of f (R) or other modified theories of gravitation, which is unique and independent of previously known tests. (C) 2011 Elsevier B.V. All rights reserved. |
| 学科主题 | Physics |
| 收录类别 | SCI |
| 资助信息 | NSFC [10535060/A050207]; NSFC group [10821504]; Ministry of Science and Technology [2007CB815401] |
| 原文出处 | http://dx.doi.org/10.1016/j.physletb.2011.07.022 |
| 语种 | 英语 |
| WOS记录号 | WOS:000295348100003 |
| 公开日期 | 2013-05-17 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/14289]  |
| 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 | Gao, X. Testing gravity with non-Gaussianity[J]. PHYSICS LETTERS B,2011,702(4):197-200. |
| APA | Gao, X.(2011).Testing gravity with non-Gaussianity.PHYSICS LETTERS B,702(4),197-200. |
| MLA | Gao, X."Testing gravity with non-Gaussianity".PHYSICS LETTERS B 702.4(2011):197-200. |
入库方式： OAI收割
来源：理论物理研究所
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