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Título: | Testing gravity with galaxy-galaxy lensing and redshift-space distortions using CFHT-Stripe 82, CFHTLenS, and BOSS CMASS datasets |
Autor: | Jullo, E.; de la Torre, S.; Cousinou, Marie-Claude; Escoffier, S.; Giocoli, C.; Metcalf, R. B.; Comparat, Johan; Shan, H. Y.; Makler, M.; Kneib, Jean-Paul; Prada, Francisco CSIC ORCID ; Yepes, G.; Gottlöber, S. | Palabras clave: | Cosmology: observations Large-scale structure of the universe Cosmological parameters |
Fecha de publicación: | 2019 | Editor: | EDP Sciences | Citación: | Astronomy and Astrophysics 627: A137 (2019) | Resumen: | 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 σ. 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, σ(z = 0.57) = 0.55 ± 0.07 and ω = 0.31 ± 0.08, in agreement with Planck cosmological results 2018. We also estimate the probe of gravity E = 0.43 ± 0.10, in agreement with ΛCDM-GR predictions of E = 0.40. This analysis reveals that RSD efficiently decreases the GGL uncertainty on ω by a factor of 4 and by 30% on σ. We make our mock catalogues available on the Skies and Universe database.© E. Jullo et al. 2019. | Descripción: | Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. | Versión del editor: | http://dx.doi.org/10.1051/0004-6361/201834629 | URI: | http://hdl.handle.net/10261/193352 | DOI: | 10.1051/0004-6361/201834629 | Identificadores: | doi: 10.1051/0004-6361/201834629 issn: 1432-0746 |
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IAA_2019_aa34629-18.pdf | 3,84 MB | Adobe PDF | Visualizar/Abrir |
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