Cosmological Tests of Gravity with the Latest Observations

doi:10.3847/1538-4357/aaf869

CORC > 国家天文台 > 中国科学院国家天文台

	Cosmological Tests of Gravity with the Latest Observations
	Li, Jian 1,2; Zhao, Gong-Bo 1,2,3
刊名	ASTROPHYSICAL JOURNAL
	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
DOI	10.3847/1538-4357/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.
资助项目	National Key Basic Research and Development Program of China[2018YFA0404503] ; NSFC[11720101004] ; NSFC[11673025] ; NSFC[11711530207] ; University of Portsmouth
WOS关键词	OSCILLATION SPECTROSCOPIC SURVEY ; GALAXIES ; SPACE
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000457437100008
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
内容类型	期刊论文
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.