No evidence for modifications of gravity from galaxy motions on cosmological scales
No evidence for modifications of gravity from galaxy motions on cosmological scales
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没有证据表明宇宙尺度上的星系运动改变了引力
DOI:
10.1038/s41550-018-0573-2
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发表时间:
2018
期刊:
影响因子:
14.1
通讯作者:
He J
中科院分区:
文献类型:
--
作者:
He J
Current tests of general relativity (GR) remain confined to the scale of stellar systems or the strong gravity regime. A departure from GR on cosmological scales has been advocated as an alternative to the cosmological constantΛ(ref. ) to account for the observed cosmic expansion history,. However, such models yield distinct values for the linear growth rate of density perturbations and consequently for the associated galaxy peculiar velocity field. Measurements of the resulting anisotropy of galaxy clustering,have thus been proposed as a powerful probe of the validity of GR on cosmological scales, but despite substantial efforts,, they suffer from systematic errors comparable to statistical uncertainties. Here, we present the results of a forward-modelling approach that fully exploits the sensitivity of the galaxy velocity field to modifications of GR. We use state-of-the-art high-resolutionN-body simulations of a standard GR (Λcold dark matter (CDM)) model and a compellingf(R) model—one of GR’s simplest variants, in which the Ricci scalar curvature,R, in the Einstein–Hilbert action is replaced by an arbitrary function ofR—to build simulated catalogues of stellar-mass-selected galaxies through a robust match to the Sloan Digital Sky Survey. We find thatf(R) fails to reproduce the observed redshift-space clustering on scales of ~1–10 Mpch−1, wherehis the dimensionless Hubble parameter. Instead, the standardΛCDM GR model agrees impressively well with the data. This result provides strong confirmation, on cosmological scales, of the robustness of Einstein’s general theory of relativity.
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影响因子:
8.6
作者:
Jian;A. Hawken;Baojiu Li;L. Guzzo
通讯作者:
L. Guzzo
影响因子:
40.6
作者:
De Felice A;Tsujikawa S
通讯作者:
Tsujikawa S
DOI:
--
发表时间:
2017
期刊:
影响因子:
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作者:
N. McCullagh;P. Norberg;S. Cole;V. Gonzalez;C. Baugh;J. Helly
通讯作者:
J. Helly
DOI:
--
发表时间:
2014
期刊:
影响因子:
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作者:
B. Reid;H. Seo;A. Leauthaud;J. Tinker;Martin;White
通讯作者:
White
影响因子:
8.6
作者:
Abbott, B. P.;Abbott, R.;Zweizig, J.
通讯作者:
Zweizig, J.