期刊
ASTRONOMY & ASTROPHYSICS
卷 627, 期 -, 页码 -出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201834629
关键词
cosmological parameters; cosmology: observations; large-scale structure of Universe
资金
- Laboratorio Interinstitucional de e-Astronomia (LIneA)
- Alfred P. Sloan Foundation
- National Science Foundation
- US Department of Energy Office of Science
- University of Arizona
- Brazilian Participation Group
- Brookhaven National Laboratory
- Carnegie Mellon University
- French Participation Group
- German Participation Group
- Harvard University
- Instituto de Astrofisica de Canarias
- Michigan State/Notre Dame/JINA Participation Group
- Johns Hopkins University
- Lawrence Berkeley National Laboratory
- Max Planck Institute for Astrophysics
- Max Planck Institute for Extraterrestrial Physics
- Pennsylvania State University
- Princeton University
- Spanish Participation Group
- Yale University
- OCEVU Labex [ANR-11LABX-0060]
- A* MIDEX project - Investissements d'Avenir French government programme [ANR-11-IDEX-0001-02]
- ANR eBOSS project of the French National Research Agency [ANR-16-CE31-0021]
- Centre National d'Etudes Spatiales
- Italian Ministry for Education, University and Research (MIUR) through the SIR individual grant SIMCODE [RBSI14P4IH]
- Cosmology with 3D-Maps of the Universe SNF grant [175751]
- MINECO/FEDER [AYA2015-63810-P]
- University of Portsmouth
- New Mexico State University
- New York University
- University of Florida
- University of Tokyo
- University of Utah
- Vanderbilt University
- University of Virginia
- University of Washington
- Ohio State University
- Leibniz-Rechenzentrum (LRZ) in Munich [2012060963]
- ASI [I/023/12/0]
- Italian Ministry of Foreign Affairs and International Cooperation Directorate General for Country Promotion (Project Crack the lens?)
The combination of galaxy-galaxy lensing (GGL) and redshift space distortion of galaxy clustering (RSD) is a privileged technique to test general relativity predictions and break degeneracies between the growth rate of structure parameter f and the amplitude of the linear power spectrum sigma(8). We performed a joint GGL and RSD analysis on 250 sq. deg using shape catalogues from CFHTLenS and CFHT-Stripe 82 and spectroscopic redshifts from the BOSS CMASS sample. We adjusted a model that includes non-linear biasing, RSD, and Alcock-Paczynski effects. We used an N-body simulation supplemented by an abundance matching prescription for CMASS galaxies to build a set of overlapping lensing and clustering mocks. Together with additional spectroscopic data, this helps us to quantify and correct several systematic errors, such as photometric redshifts. We find f (z = 0.57) = 0.95 +/- 0.23, sigma(8)(z = 0.57) = 0.55 +/- 0.07 and Omega(m) = 0.31 +/- 0.08, in agreement with Planck cosmological results 2018. We also estimate the probe of gravity E-G = 0.43 +/- 0.10, in agreement with Lambda CDM-GR predictions of E-G = 0.40. This analysis reveals that RSD efficiently decreases the GGL uncertainty on Omega(m) by a factor of 4 and by 30% on sigma(8). We make our mock catalogues available on the Skies and Universe database.
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