ITP OpenIR  > 理论物理所2011年知识产出
Testing gravity with non-Gaussianity
Gao, X; Gao, X (reprint author), Univ Paris 07, CNRS, APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
2011
发表期刊PHYSICS LETTERS B
ISSN0370-2693
卷号702期号:4页码:197-200
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.
部门归属[Gao, Xian] Univ Paris 07, CNRS, APC, F-75205 Paris 13, France; [Gao, Xian] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China; [Gao, Xian] Ecole Normale Super, Phys Theor Lab, F-75231 Paris 05, France; [Gao, Xian] Inst Astrophys, F-75014 Paris, France
关键词Gravitational Perturbations Evolution
学科领域Physics
资助者NSFC [10535060/A050207]; NSFC group [10821504]; Ministry of Science and Technology [2007CB815401] ; NSFC [10535060/A050207]; NSFC group [10821504]; Ministry of Science and Technology [2007CB815401] ; NSFC [10535060/A050207]; NSFC group [10821504]; Ministry of Science and Technology [2007CB815401] ; NSFC [10535060/A050207]; NSFC group [10821504]; Ministry of Science and Technology [2007CB815401]
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收录类别SCI
语种英语
资助者NSFC [10535060/A050207]; NSFC group [10821504]; Ministry of Science and Technology [2007CB815401] ; NSFC [10535060/A050207]; NSFC group [10821504]; Ministry of Science and Technology [2007CB815401] ; NSFC [10535060/A050207]; NSFC group [10821504]; Ministry of Science and Technology [2007CB815401] ; NSFC [10535060/A050207]; NSFC group [10821504]; Ministry of Science and Technology [2007CB815401]
WOS记录号WOS:000295348100003
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/14289
专题理论物理所2011年知识产出
通讯作者Gao, X (reprint author), Univ Paris 07, CNRS, APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
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Gao, X,Gao, X . Testing gravity with non-Gaussianity[J]. PHYSICS LETTERS B,2011,702(4):197-200.
APA Gao, X,&Gao, X .(2011).Testing gravity with non-Gaussianity.PHYSICS LETTERS B,702(4),197-200.
MLA Gao, X,et al."Testing gravity with non-Gaussianity".PHYSICS LETTERS B 702.4(2011):197-200.
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