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Gao, X; Gao, X (reprint author), Univ Paris 07, CNRS, APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
Testing gravity with non-Gaussianity
发表期刊PHYSICS LETTERS B
语种英语
关键词Gravitational Perturbations Evolution
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.
2011
ISSN0370-2693
卷号702期号:4页码:197-200
学科领域Physics
收录类别SCI
项目资助者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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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
专题理论物理所科研产出_SCI论文
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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GB/T 7714
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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