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Cosmological Tests of Gravity with the Latest Observations

文献类型：期刊论文

作者Li, Jian1,2; Zhao, Gong-Bo1,2,3
刊名ASTROPHYSICAL JOURNAL
出版日期2019-02-01
卷号871期号:2页码:10
关键词cosmological parameters cosmology: theory dark energy large-scale structure of universe
ISSN号0004-637X
DOI10.3847/1538-4357/aaf869
英文摘要We perform observational tests of modified gravity on cosmological scales following model-dependent and model-independent approaches using the latest astronomical observations, including measurements of the local Hubble constant, cosmic microwave background, the baryonic acoustic oscillations and redshift space distortions derived from galaxy surveys including the Sloan Digital Sky Survey BOSS and eBOSS, as well as the weak lensing observations performed by the CFHTLenS team. Combining all these data sets, we find a deviation from the prediction of general relativity in both the effective Newton's constant, mu(a, k), and in the gravitational slip, eta(a, k). The deviation is at a 3.1 sigma level in the joint {mu(a, k), eta(a, k)} space using a two-parameter phenomenological model for mu and eta, and reaches a 3.7 sigma level if a general parameterization is used. This signal, which may be subject to unknown observational systematics, or a sign of new physics, is worth further investigating with forthcoming observations.
WOS关键词OSCILLATION SPECTROSCOPIC SURVEY ; GALAXIES ; SPACE
资助项目National Key Basic Research and Development Program of China[2018YFA0404503] ; NSFC[11720101004] ; NSFC[11673025] ; NSFC[11711530207] ; University of Portsmouth
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000457437100008
出版者IOP PUBLISHING LTD
资助机构National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; University of Portsmouth ; University of Portsmouth ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; University of Portsmouth ; University of Portsmouth ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; University of Portsmouth ; University of Portsmouth ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; University of Portsmouth ; University of Portsmouth
源URL[http://ir.bao.ac.cn/handle/114a11/24978]  
专题中国科学院国家天文台
通讯作者Li, Jian
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
3.Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England
推荐引用方式
GB/T 7714		 Li, Jian,Zhao, Gong-Bo. Cosmological Tests of Gravity with the Latest Observations[J]. ASTROPHYSICAL JOURNAL,2019,871(2):10.
APA Li, Jian,&Zhao, Gong-Bo.(2019).Cosmological Tests of Gravity with the Latest Observations.ASTROPHYSICAL JOURNAL,871(2),10.
MLA Li, Jian,et al."Cosmological Tests of Gravity with the Latest Observations".ASTROPHYSICAL JOURNAL 871.2(2019):10.

入库方式： OAI收割

来源：国家天文台

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