RCSLenS: testing gravitational physics through the cross-correlation of weak lensing and large-scale structure
The unknown nature of ‘dark energy’ motivates continued cosmological tests of large-scale gravitational physics. We present a new consistency check based on the relative amplitude of non-relativistic galaxy peculiar motions, measured via redshift-space distortion, and the relativistic deflection of...
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Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 2016-03, Vol.456 (3), p.2806-2828 |
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creator | Blake, Chris Joudaki, Shahab Heymans, Catherine Choi, Ami Erben, Thomas Harnois-Deraps, Joachim Hildebrandt, Hendrik Joachimi, Benjamin Nakajima, Reiko van Waerbeke, Ludovic Viola, Massimo |
description | The unknown nature of ‘dark energy’ motivates continued cosmological tests of large-scale gravitational physics. We present a new consistency check based on the relative amplitude of non-relativistic galaxy peculiar motions, measured via redshift-space distortion, and the relativistic deflection of light by those same galaxies traced by galaxy–galaxy lensing. We take advantage of the latest generation of deep, overlapping imaging and spectroscopic data sets, combining the Red Cluster Sequence Lensing Survey, the Canada–France–Hawaii Telescope Lensing Survey, the WiggleZ Dark Energy Survey and the Baryon Oscillation Spectroscopic Survey. We quantify the results using the ‘gravitational slip’ statistic E
G, which we estimate as 0.48 ± 0.10 at z = 0.32 and 0.30 ± 0.07 at z = 0.57, the latter constituting the highest redshift at which this quantity has been determined. These measurements are consistent with the predictions of General Relativity, for a perturbed Friedmann–Robertson–Walker metric in a Universe dominated by a cosmological constant, which are E
G = 0.41 and 0.36 at these respective redshifts. The combination of redshift-space distortion and gravitational lensing data from current and future galaxy surveys will offer increasingly stringent tests of fundamental cosmology. |
doi_str_mv | 10.1093/mnras/stv2875 |
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G, which we estimate as 0.48 ± 0.10 at z = 0.32 and 0.30 ± 0.07 at z = 0.57, the latter constituting the highest redshift at which this quantity has been determined. These measurements are consistent with the predictions of General Relativity, for a perturbed Friedmann–Robertson–Walker metric in a Universe dominated by a cosmological constant, which are E
G = 0.41 and 0.36 at these respective redshifts. The combination of redshift-space distortion and gravitational lensing data from current and future galaxy surveys will offer increasingly stringent tests of fundamental cosmology.</description><identifier>ISSN: 0035-8711</identifier><identifier>EISSN: 1365-2966</identifier><identifier>DOI: 10.1093/mnras/stv2875</identifier><language>eng</language><publisher>London: Oxford University Press</publisher><subject>Astronomy ; Dark energy ; Deflection ; Distortion ; Galaxies ; Gravitation ; Gravity ; Red shift ; Sky surveys (astronomy) ; Stars & galaxies ; Statistics</subject><ispartof>Monthly notices of the Royal Astronomical Society, 2016-03, Vol.456 (3), p.2806-2828</ispartof><rights>2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society 2015</rights><rights>Copyright Oxford University Press, UK Mar 1, 2016</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c469t-4affc49f7439a996932e94d2de548e54e267837f6d9b152aa7f851c93752e6f3</citedby><cites>FETCH-LOGICAL-c469t-4affc49f7439a996932e94d2de548e54e267837f6d9b152aa7f851c93752e6f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,782,786,1586,1606,27931,27932</link.rule.ids><linktorsrc>$$Uhttps://dx.doi.org/10.1093/mnras/stv2875$$EView_record_in_Oxford_University_Press$$FView_record_in_$$GOxford_University_Press</linktorsrc></links><search><creatorcontrib>Blake, Chris</creatorcontrib><creatorcontrib>Joudaki, Shahab</creatorcontrib><creatorcontrib>Heymans, Catherine</creatorcontrib><creatorcontrib>Choi, Ami</creatorcontrib><creatorcontrib>Erben, Thomas</creatorcontrib><creatorcontrib>Harnois-Deraps, Joachim</creatorcontrib><creatorcontrib>Hildebrandt, Hendrik</creatorcontrib><creatorcontrib>Joachimi, Benjamin</creatorcontrib><creatorcontrib>Nakajima, Reiko</creatorcontrib><creatorcontrib>van Waerbeke, Ludovic</creatorcontrib><creatorcontrib>Viola, Massimo</creatorcontrib><title>RCSLenS: testing gravitational physics through the cross-correlation of weak lensing and large-scale structure</title><title>Monthly notices of the Royal Astronomical Society</title><description>The unknown nature of ‘dark energy’ motivates continued cosmological tests of large-scale gravitational physics. We present a new consistency check based on the relative amplitude of non-relativistic galaxy peculiar motions, measured via redshift-space distortion, and the relativistic deflection of light by those same galaxies traced by galaxy–galaxy lensing. We take advantage of the latest generation of deep, overlapping imaging and spectroscopic data sets, combining the Red Cluster Sequence Lensing Survey, the Canada–France–Hawaii Telescope Lensing Survey, the WiggleZ Dark Energy Survey and the Baryon Oscillation Spectroscopic Survey. We quantify the results using the ‘gravitational slip’ statistic E
G, which we estimate as 0.48 ± 0.10 at z = 0.32 and 0.30 ± 0.07 at z = 0.57, the latter constituting the highest redshift at which this quantity has been determined. These measurements are consistent with the predictions of General Relativity, for a perturbed Friedmann–Robertson–Walker metric in a Universe dominated by a cosmological constant, which are E
G = 0.41 and 0.36 at these respective redshifts. 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G, which we estimate as 0.48 ± 0.10 at z = 0.32 and 0.30 ± 0.07 at z = 0.57, the latter constituting the highest redshift at which this quantity has been determined. These measurements are consistent with the predictions of General Relativity, for a perturbed Friedmann–Robertson–Walker metric in a Universe dominated by a cosmological constant, which are E
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subjects | Astronomy Dark energy Deflection Distortion Galaxies Gravitation Gravity Red shift Sky surveys (astronomy) Stars & galaxies Statistics |
title | RCSLenS: testing gravitational physics through the cross-correlation of weak lensing and large-scale structure |
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