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  Testing gravity with galaxy-galaxy lensing and redshift-space distortions using CFHT-Stripe 82, CFHTLenS, and BOSS CMASS datasets

Jullo, E., de la Torre, S., Cousinou, M.-C., Escoer, S., Giocoli, C., Metcalf, R. B., et al. (2019). Testing gravity with galaxy-galaxy lensing and redshift-space distortions using CFHT-Stripe 82, CFHTLenS, and BOSS CMASS datasets. Astronomy and Astrophysics, 627: A137. doi:10.1051/0004-6361/201834629.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-ECDF-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-ECE0-5
Genre: Journal Article

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Jullo, E., Author
de la Torre, S., Author
Cousinou, M.-C., Author
Escoer, S., Author
Giocoli, C., Author
Metcalf, R. B., Author
Comparat, J.1, Author              
Shan, H.-Y., Author
Makler, M., Author
Kneib, J.-P., Author
Prada, F., Author
Yepes, G., Author
Gottlöber, S., Author
Affiliations:
1High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society, ou_159890              

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 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 parameter f and the amplitude of the linear power spectrum σ8. 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, σ8(z = 0.57) = 0.55 ± 0.07 and Ωm = 0.31 ± 0.08, in agreement with Planck cosmological results 2018. We also estimate the probe of gravity EG = 0.43 ± 0.10, in agreement with ΛCDM−GR predictions of EG = 0.40. This analysis reveals that RSD efficiently decreases the GGL uncertainty on Ωm by a factor of 4 and by 30% on σ8. We make our mock catalogues available on the Skies and Universe database.

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 Dates: 2019-05-02
 Publication Status: Published online
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 Identifiers: DOI: 10.1051/0004-6361/201834629
Other: LOCALID: 3173060
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Title: Astronomy and Astrophysics
  Other : Astron. Astrophys.
Source Genre: Journal
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Publ. Info: France : EDP Sciences S A
Pages: - Volume / Issue: 627 Sequence Number: A137 Start / End Page: - Identifier: ISSN: 1432-0746
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1