__smbhome.uscs.susx.ac.uk_akj23_Desktop_mony4.pdf (1.5 MB)
KiDS+2dFLenS+GAMA: testing the cosmological model with the EG statistic
journal contribution
posted on 2023-06-09, 15:53 authored by A Amon, C Blake, C Heymans, C D Leonard, M Asgari, M Bilicki, A Choi, T Erben, K Glazebrook, J Harnois-Déraps, H Hildebrandt, H Hoekstra, B Joachimi, S Joudaki, K Kuijken, C Lidman, Jonathan LovedayJonathan Loveday, D Parkinson, E A Valentijn, C WolfWe 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 the matter 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 CDM Universe, we find m(z = 0) = 0.25 ± 0.03. With this paper, we publicly release the 2dFLenS data set at: http://2dflens.swin.edu.au.
History
Publication status
- Published
File Version
- Published version
Journal
Monthly Notices of the Royal Astronomical SocietyISSN
0035-8711Publisher
Oxford University PressExternal DOI
Issue
3Volume
479Page range
3422-3437Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Astronomy Centre Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2018-11-19First Open Access (FOA) Date
2018-11-19First Compliant Deposit (FCD) Date
2018-11-12Usage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC