KiDS+2dFLenS+GAMA: testing the cosmological model with the EG statistic

被引：46

作者：

Amon, A. ^{[1
]}

Blake, C. ^{[2
]}

Heymans, C. ^{[1
]}

Leonard, C. D. ^{[3
]}

Asgari, M. ^{[1
]}

Bilicki, M. ^{[4
,5
]}

Choi, A. ^{[6
]}

Erben, T. ^{[7
]}

Glazebrook, K. ^{[2
]}

Harnois-Deraps, J. ^{[1
]}

Hildebrandt, H. ^{[7
]}

Hoekstra, H. ^{[4
]}

Joachimi, B. ^{[8
]}

Joudaki, S. ^{[9
]}

Kuijken, K. ^{[4
]}

Lidman, C. ^{[10
]}

Loveday, J. ^{[11
]}

Parkinson, D. ^{[12
,13
]}

Valentijn, E. A. ^{[14
]}

Wolf, C. ^{[15
]}

机构：

[1] Univ Edinburgh, Inst Astron, Royal Observ, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland

[2] Swinburne Univ Technol, Ctr Astrophys & Supercomp, POB 218, Hawthorn, Vic 3122, Australia

[3] Carnegie Mellon Univ, McWilliams Ctr Cosmol, 5000 Forbes Ave, Pittsburgh, PA 15213 USA

[4] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands

[5] Natl Ctr Nucl Res, Div Astrophys, POB 447, PL-90950 Lodz, Poland

[6] Ohio State Univ, Ctr Cosmol & AstroParticle Phys, 191 West Woodruff Ave, Columbus, OH 43210 USA

[7] Argelander Inst Astron, Hugel 71, D-53121 Bonn, Germany

[8] UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England

[9] Univ Oxford, Dept Phys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England

[10] Australian Astron Observ, POB 915, N Ryde, NSW 1670, Australia

[11] Univ Sussex, Ctr Astron, Brighton BN1 9QH, E Sussex, England

[12] Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia

[13] Korea Astron & Space Sci Inst, Daejeon 34055, South Korea

[14] Univ Groningen, Kapteyn Astron Inst, NL-9700 AD Groningen, Netherlands

[15] Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2018年 / 479卷 / 03期

基金：

加拿大创新基金会; 澳大利亚研究理事会; 欧洲研究理事会;

关键词：

gravitational lensing: weak; surveys; cosmology:; observations; large-scale structure of Universe; COSMIC SHEAR; PARAMETER CONSTRAINTS; GENERAL-RELATIVITY; LENSING ANALYSIS; GALAXY; GRAVITY; ACCELERATION; RCSLENS; SCALES; SPACE;

D O I：

10.1093/mnras/sty1624

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：3422 / 3437

页数：16

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