KiDS+2dFLenS+GAMA
| Autor: | C. D. Leonard, Shahab Joudaki, Christian Wolf, Karl Glazebrook, Edwin A. Valentijn, Henk Hoekstra, C. Lidman, Konrad Kuijken, Maciej Bilicki, Marika Asgari, Thomas Erben, Chris Blake, Benjamin Joachimi, Jon Loveday, David Parkinson, Catherine Heymans, Joachim Harnois-Déraps, A. Choi, Alexandra Amon, Hendrik Hildebrandt |
|---|---|
| Přispěvatelé: | Astronomy |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
observations [Surveys
cosmology] Cosmology and Nongalactic Astrophysics (astro-ph.CO) LENSING SURVEY General relativity COSMIC SHEAR PARAMETER CONSTRAINTS media_common.quotation_subject Cosmic microwave background FOS: Physical sciences Large-scale structure of universe Astrophysics 01 natural sciences Cosmology gravitational lensing: weak surveys 0103 physical sciences LARGE-SCALE STRUCTURE GENERAL-RELATIVITY 010303 astronomy & astrophysics QC Weak gravitational lensing Statistic QB media_common Physics surveys cosmology: observations large-scale structure of Universe 010308 nuclear & particles physics Astronomy and Astrophysics Galaxy Universe Amplitude Space and Planetary Science cosmology: observations COVARIANCE MATRICES large-scale structure of Universe SURVEY DESIGN WEAK weak [Gravitational lensing] REDSHIFT-SPACE Astrophysics - Cosmology and Nongalactic Astrophysics GAMA GALAXY GROUPS |
| Zdroj: | Monthly Notices of the Royal Astronomical Society, 479(3), 3422-3437. Oxford University Press 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, vol. 479, no. 3, pp. 3422-3437 . https://doi.org/10.1093/mnras/sty1624 Monthly Notices of the Royal Astronomical Society Monthly Notices of the Royal Astronomical Society, 479(3), 3422-3437 |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/sty1624 |
| Popis: | We present a new measurement of $E_{\rm G}$, which combines measurements of weak gravitational lensing, real-space 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 $E_{\rm G}(\overline{z}=0.267)=0.43 \pm 0.13$ (GAMA), $E_{\rm G}(\overline{z}=0.305)=0.27 \pm 0.08$ (LOWZ+2dFLOZ) and $E_{\rm G}(\overline{z}=0.554)=0.26 \pm 0.07$ (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 $E_{\rm G}$ 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 and assuming GR, we find $\Omega_{\rm m}(z=0)=0.25\pm0.03$. With this paper we publicly release the 2dFLenS dataset at: \url{http://2dflens.swin.edu.au}. Comment: 17 pages, 8 figures |
| Databáze: | OpenAIRE |
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