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Probing the Time Variation of the Effective Newton’s Constant with Optimal Redshift Weights
Li,Jian1,2; Zhao,Gong-Bo1,3,4
2019-05-21
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume877Issue:1
AbstractAbstract We propose a new method for probing the time variation of the effective Newton’s constant Geff, based on the optimal redshift weighting scheme, and demonstrate the efficacy using the DESI galaxy spectroscopic survey. We find that with the optimal redshift weights, the evolution of can be significantly better measured: the uncertainty of can be reduced by a factor of 2.2?~?12.8 using the DESI Bright Galaxy Survey sample at z???0.45, and by a factor of 1.3?~?4.4 using the DESI Emission Line Galaxies sample covering 0.65???z???1.65.
Keywordcosmological parameters cosmology: theory dark energy distance scale large-scale structure of universe
DOI10.3847/1538-4357/ab16eb
Language英语
WOS IDIOP:0004-637X-877-1-ab16eb
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/28886
Collection中国科学院国家天文台
Affiliation1.National Astronomical Observatories, Chinese Academy of Science, Beijing, 100101, People's Republic of China; jli@nao.cas.cn, gbzhao@nao.cas.cn
2.University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
3.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
4.Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth, PO1 3FX, UK
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GB/T 7714
Li,Jian,Zhao,Gong-Bo. Probing the Time Variation of the Effective Newton’s Constant with Optimal Redshift Weights[J]. The Astrophysical Journal,2019,877(1).
APA Li,Jian,&Zhao,Gong-Bo.(2019).Probing the Time Variation of the Effective Newton’s Constant with Optimal Redshift Weights.The Astrophysical Journal,877(1).
MLA Li,Jian,et al."Probing the Time Variation of the Effective Newton’s Constant with Optimal Redshift Weights".The Astrophysical Journal 877.1(2019).
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