TY - JOUR
T1 - KiDS+2dFLenS+GAMA
T2 - Testing the cosmological model with the EG statistic
AU - Amon, A.
AU - Blake, C.
AU - Heymans, C.
AU - Leonard, C. D.
AU - Asgari, M.
AU - Bilicki, M.
AU - Choi, A.
AU - Erben, T.
AU - Glazebrook, K.
AU - Harnois-Déraps, J.
AU - Hildebrandt, H.
AU - Hoekstra, H.
AU - Joachimi, B.
AU - Joudaki, S.
AU - Kuijken, K.
AU - Lidman, C.
AU - Loveday, J.
AU - Parkinson, D.
AU - Valentijn, E. A.
AU - Wolf, C.
N1 - Near final version deposited to arXiv 29.11.17, before e-publication date 23.06.18.
PY - 2018/9/21
Y1 - 2018/9/21
N2 - We present a new measurement of EG, 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 EG(z = 0.267) = 0.43 ± 0.13 (GAMA), EG(z = 0.305) = 0.27 ± 0.08 (LOWZ+2dFLOZ), and EG(z = 0.554) = 0.26 ± 0.07 (CMASS+2dFHIZ). We demonstrate that the existing tension in the value of thematter density parameter hinders the robustness of this statistic as solely a test of GR. We find that our EG measurements, as well as existing ones in the literature, favour a lower matter density cosmology than the cosmic microwave background. For a flat ΛCDM Universe, we find Ωm(z = 0) = 0.25 ± 0.03. With this paper, we publicly release the 2dFLenS data set at: http://2dflens.swin.edu.au.
AB - We present a new measurement of EG, 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 EG(z = 0.267) = 0.43 ± 0.13 (GAMA), EG(z = 0.305) = 0.27 ± 0.08 (LOWZ+2dFLOZ), and EG(z = 0.554) = 0.26 ± 0.07 (CMASS+2dFHIZ). We demonstrate that the existing tension in the value of thematter density parameter hinders the robustness of this statistic as solely a test of GR. We find that our EG measurements, as well as existing ones in the literature, favour a lower matter density cosmology than the cosmic microwave background. For a flat ΛCDM Universe, we find Ωm(z = 0) = 0.25 ± 0.03. With this paper, we publicly release the 2dFLenS data set at: http://2dflens.swin.edu.au.
KW - Gravitational lensing: weak
KW - Large-scale structure of universe
KW - Surveys, cosmology: observations
UR - http://www.scopus.com/inward/record.url?scp=85051464912&partnerID=8YFLogxK
U2 - 10.1093/mnras/sty1624
DO - 10.1093/mnras/sty1624
M3 - Article
AN - SCOPUS:85051464912
SN - 0035-8711
VL - 479
SP - 3422
EP - 3437
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 3
ER -