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

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; J. Loveday; D. Parkinson; E. A. Valentijn; C. Wolf

doi:10.1093/mnras/sty1624

KiDS+2dFLenS+GAMA: Testing the cosmological model with the E_G statistic

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, J. Loveday, D. Parkinson, E. A. Valentijn, C. Wolf

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Abstract

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 E_G(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 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 ΛCDM Universe, we find Ω_m(z = 0) = 0.25 ± 0.03. With this paper, we publicly release the 2dFLenS data set at: http://2dflens.swin.edu.au.

Original language	English
Pages (from-to)	3422-3437
Number of pages	16
Journal	Monthly Notices of the Royal Astronomical Society
Volume	479
Issue number	3
DOIs	https://doi.org/10.1093/mnras/sty1624
Publication status	Published - 21 Sept 2018

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Amon, A., Blake, C., Heymans, C., Leonard, C. D., Asgari, M., Bilicki, M., Choi, A., Erben, T., Glazebrook, K., Harnois-Déraps, J., Hildebrandt, H., Hoekstra, H., Joachimi, B., Joudaki, S., Kuijken, K., Lidman, C., Loveday, J., Parkinson, D., Valentijn, E. A., & Wolf, C. (2018). KiDS+2dFLenS+GAMA: Testing the cosmological model with the E_G statistic. Monthly Notices of the Royal Astronomical Society, 479(3), 3422-3437. https://doi.org/10.1093/mnras/sty1624

@article{9ad3158b3d654c2f8b142ad437c0eebf,

title = "KiDS+2dFLenS+GAMA: Testing the cosmological model with the EG statistic",

abstract = "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.",

keywords = "Gravitational lensing: weak, Large-scale structure of universe, Surveys, cosmology: observations",

author = "A. Amon and C. Blake and C. Heymans and Leonard, {C. D.} and M. Asgari and M. Bilicki and A. Choi and T. Erben and K. Glazebrook and J. Harnois-D{\'e}raps and H. Hildebrandt and H. Hoekstra and B. Joachimi and S. Joudaki and K. Kuijken and C. Lidman and J. Loveday and D. Parkinson and Valentijn, {E. A.} and C. Wolf",

note = "Publisher Copyright: {\textcopyright} 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.",

year = "2018",

month = sep,

day = "21",

doi = "10.1093/mnras/sty1624",

language = "English",

volume = "479",

pages = "3422--3437",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "3",

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Amon, A, Blake, C, Heymans, C, Leonard, CD, Asgari, M, Bilicki, M, Choi, A, Erben, T, Glazebrook, K, Harnois-Déraps, J, Hildebrandt, H, Hoekstra, H, Joachimi, B, Joudaki, S, Kuijken, K, Lidman, C, Loveday, J, Parkinson, D, Valentijn, EA & Wolf, C 2018, 'KiDS+2dFLenS+GAMA: Testing the cosmological model with the E_G statistic', Monthly Notices of the Royal Astronomical Society, vol. 479, no. 3, pp. 3422-3437. https://doi.org/10.1093/mnras/sty1624

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.

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

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 -

KiDS+2dFLenS+GAMA: Testing the cosmological model with the E_G statistic

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