Thursday. Friday.
1711.10999
KiDS+2dFLenS+GAMA: testing the cosmological model with the $E_{\rm G}$ statistic
Amon, Blake, Heymans, et al
Present a new measurement of E_G, which combines measurements of WL, GC and z-space distortions. This statistic was proposed as a consistency test of GR that is insensitive to linear, deterministic galaxy bias and the matter clustering amplitude. Combine deep imaging data from KiDS with overlapping spectroscopy from 2dFLenS, BOSS DR12 and GAMA and find E_G(z=0.27)=0.43±0.13 (GAMA), E_G(z=0.31)=0.27±0.08 (LOWZ+2dFLOZ) and E_G(z=0.55)=0.26±0.07 (CMASS+2dFHIZ). 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. Find that the E_G measurements, as well as existing ones in the literature, favor a lower matter density cosmology than the CMB. For a flat LCDM universe, find Omega_m(z=0)=0.25±0.03. With this paper, publicly release the 2dFLenS dataset at http://2dflens.swin.edu.au.
1711.10999
KiDS+2dFLenS+GAMA: testing the cosmological model with the $E_{\rm G}$ statistic
Amon, Blake, Heymans, et al
Present a new measurement of E_G, which combines measurements of WL, GC and z-space distortions. This statistic was proposed as a consistency test of GR that is insensitive to linear, deterministic galaxy bias and the matter clustering amplitude. Combine deep imaging data from KiDS with overlapping spectroscopy from 2dFLenS, BOSS DR12 and GAMA and find E_G(z=0.27)=0.43±0.13 (GAMA), E_G(z=0.31)=0.27±0.08 (LOWZ+2dFLOZ) and E_G(z=0.55)=0.26±0.07 (CMASS+2dFHIZ). 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. Find that the E_G measurements, as well as existing ones in the literature, favor a lower matter density cosmology than the CMB. For a flat LCDM universe, find Omega_m(z=0)=0.25±0.03. With this paper, publicly release the 2dFLenS dataset at http://2dflens.swin.edu.au.
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