Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 429, Issue 3, Pages 2249-2263Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sts493
Keywords
gravitational lensing: weak; cosmology: observations
Categories
Funding
- Canadian Space Agency
- Compute Canada
- Government of Ontario, Ontario Research Fund - Research Excellence
- University of Toronto
- European CommissionOs Marie Curie Research Training Network DUEL [MRTN-CT-2006-036133]
- European Research Council under the EC FP7 grant [240185, 279396, 240672]
- Australian Research Council
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Canadian Institute for Advanced Research (CIfAR, Cosmology and Gravity program)
- Deutsche Forschungsgemeinschaft [ER 327/3-1]
- Transregional Collaborative Research Centre TR 33 'The Dark Universe'
- Marie Curie IOF [252760]
- CITA National Fellowship
- Marie Curie IRG grant [230924]
- Netherlands Organisation for Scientic Research [639.042.814]
- Royal Society University Research Fellowship
- CNRS/INSU (Institut National des Sciences de l'Univers)
- Programme National Galaxies et Cosmologie (PNCG)
- NSFC [11103012, 10878003]
- SMEC [10CG46]
- STCSM [11290706600]
- NSF [AST-0444059-001]
- SAO [GO0-11147A]
- NWO
- Netherlands Organisation for Scientific Research (NWO)
- Beecroft Institute for Particle Astrophysics and Cosmology
- Canada Foundation for Innovation
- [12ZZ134]
- STFC [ST/J001422/1, ST/H002456/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J001422/1, ST/H002456/1] Funding Source: researchfish
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Dark energy may be the first sign of new fundamental physics in the Universe, taking either a physical form or revealing a correction to Einsteinian gravity. Weak gravitational lensing and galaxy peculiar velocities provide complementary probes of general relativity, and in combination allow us to test modified theories of gravity in a unique way. We perform such an analysis by combining measurements of cosmic shear tomography from the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS) with the growth of structure from the WiggleZ Dark Energy Survey and the Six-degree-Field Galaxy Survey, producing the strongest existing joint constraints on the metric potentials that describe general theories of gravity. For scale-independent modifications to the metric potentials which evolve linearly with the effective dark energy density, we find present-day cosmological deviations in the Newtonian potential and curvature potential from the prediction of general relativity to be Delta Psi/Psi = 0.05 +/- 0.25 and Delta Phi/Phi = -0.05 +/- 0.3, respectively (68 per cent confidence limits).
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