Testing gravity with galaxy-galaxy lensing and redshift-space distortions using CFHT-Stripe 82, CFHTLenS, and BOSS CMASS datasets
Year: 2019
Type: article
Abstract: 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 parameterfand the amplitude of the linear power spectrumσ8. 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 findf(z = 0.57) = 0.95 ± 0.23,σ8(z = 0.57) = 0.55 ± 0.07 and Ωm = 0.31 ± 0.08, in agreement withPlanckcosmological results 2018. We also estimate the probe of gravityEG = 0.43 ± 0.10, in agreement with ΛCDM−GR predictions ofEG = 0.40. This analysis reveals that RSD efficiently decreases the GGL uncertainty on Ωmby a factor of 4 and by 30% onσ8. We make our mock catalogues available on the Skies and Universe database.
Source: Astronomy and Astrophysics
Authors: E. Jullo, S. de la Torre, M.-C. Cousinou, S. Escoffier, C. Giocoli, R. B. Metcalf, J. Comparat, H.-Y. Shan, M. Makler, J.-P. Kneib, F. Prada, G. Yepes, S. Gottlöber
Institutions: Centre National de la Recherche Scientifique, Aix-Marseille Université, Centre de physique des particules de Marseille, Institut National de Physique Nucléaire et de Physique des Particules, University of Ferrara, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Osservatorio di Astrofisica e Scienza dello Spazio, University of Bologna, Max Planck Institute for Extraterrestrial Physics, Shanghai Astronomical Observatory, Centro Brasileiro de Pesquisas Físicas, École Polytechnique Fédérale de Lausanne, Instituto de Astrofísica de Andalucía, Universidad Autónoma de Madrid, Leibniz Institute for Astrophysics Potsdam
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $1,680
Funders: National Science Foundation, U.S. Department of Energy, Alfred P. Sloan Foundation, Yale University, Vanderbilt University, Princeton University, Ohio State University, Harvard University, University of Washington, Johns Hopkins University, University of Arizona, Carnegie Mellon University, University of Portsmouth, New Mexico State University, York University, Agence Nationale de la Recherche, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Partnership for Advanced Computing in Europe AISBL, Ministero dell’Istruzione, dell’Università e della Ricerca, Centre National de la Recherche Scientifique, Ministero degli Affari Esteri e della Cooperazione Internazionale, Office of Science, College of Engineering, Michigan State University, Leibniz-Gemeinschaft, Leibniz-Rechenzentrum, Brookhaven National Laboratory, Lawrence Berkeley National Laboratory
Awards: G1194493812, INITIATIVE D'EXCELLENCE AIX MARSEILLE UNIVERSITE, G1742243815, Cosmology with 3D-Maps of the Universe, G3364984810, Cosmological probes of Gravity and Dark Energy, G4586079565, G4866930200, Reaktive und strukturell ungewöhnliche Organokomplexe mit Uebergangsmetallen, G782245399, Origines, Constituants et EVolution de l'Univers
OpenAlex ID: W2921026706