期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 479, 期 3, 页码 3422-3437出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sty1624
关键词
gravitational lensing: weak; surveys, cosmology: observations, large-scale structure of Universe
资金
- European Research Council [647112, 693024]
- Australian Research Council through the award of a Future Fellowship
- McWilliams Center for Cosmology, Department of Physics, CarnegieMellon University
- Emmy Noether grant of the Deutsche Forschungsgemeinschaft [Hi 1495/2-1]
- Vici grant - Netherlands Organisation for Scientific Research (NWO) [639.043.512]
- STFC Ernest Rutherford Fellowship [STFC Ernest Rutherford Fellowship]
- EuropeansCommission under a Marie-Sklodwoska-Curie European Fellowship (EU) [656869]
- Beecroft Trust
- Netherlands Organisation for Scientific Research, NWO [614.001.451]
- ESO Telescopes at the La Silla Paranal Observatory [177.A-3016, 177.A-3017, 177.A-3018]
- Australian Astronomical Observatory [A/2014B/008]
- STFC (UK)
- ARC (Australia)
- AAO
- Canada Foundation for Innovation under Compute Canada
- Government of Ontario
- Ontario Research Fund - Research Excellence
- University of Toronto
- STFC [ST/M001334/1] Funding Source: UKRI
We present a new measurement of E-G, which combines measurements of weak gravitational lensing, galaxy clustering, and redshift-space distortions. This statistic was proposed as a consistency test of General Relativity (GR) that is insensitive to linear, deterministic galaxy bias, and the matter clustering amplitude. We combine deep imaging data from KiDS with overlapping spectroscopy from 2dFLenS, BOSS DR12, and GAMA and find E-G((z) over bar = 0.267) = 0.43 +/- 0.13 (GAMA), E-G((z) over bar = 0.305) = 0.27 +/- 0.08 (LOWZ+2dFLOZ), and E-G((z) over bar = 0.554) = 0.26 +/- 0.07 (CMASS+2dFHIZ). We demonstrate that the existing tension in the value of the matter density parameter hinders the robustness of this statistic as solely a test of GR. We find that our E-G measurements, as well as existing ones in the literature, favour a lower matter density cosmology than the cosmic microwave background. For a flat Lambda CDM Universe, we find Omega(m)(z = 0) = 0.25 +/- 0.03. With this paper, we publicly release the 2dFLenS data set at: http://2dflens.swin.edu.au.
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