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KiDS-1000 cosmology: Cosmic shear constraints and comparison between two point statistics

Asgari, Marika; Lin, Chieh An; Joachimi, Benjamin; Giblin, Benjamin; Heymans, Catherine; Hildebrandt, Hendrik; Kannawadi, Arun; Stölzner, Benjamin; Tröster, Tilman; Van Den Busch, Jan Luca; Wright, Angus H.; Bilicki, Maciej; Blake, Chris; De Jong, Jelte; Dvornik, Andrej; Erben, Thomas; Getman, Fedor; Hoekstra, Henk; Köhlinger, Fabian; Kuijken, Konrad; Miller, Lance; Radovich, Mario; Schneider, Peter; Shan, Huan Yuan; Valentijn, Edwin

Authors

Marika Asgari

Chieh An Lin

Benjamin Joachimi

Benjamin Giblin

Catherine Heymans

Hendrik Hildebrandt

Arun Kannawadi

Benjamin Stölzner

Tilman Tröster

Jan Luca Van Den Busch

Angus H. Wright

Maciej Bilicki

Chris Blake

Jelte De Jong

Andrej Dvornik

Thomas Erben

Fedor Getman

Henk Hoekstra

Fabian Köhlinger

Konrad Kuijken

Lance Miller

Mario Radovich

Peter Schneider

Huan Yuan Shan

Edwin Valentijn



Abstract

We present cosmological constraints from a cosmic shear analysis of the fourth data release of the Kilo-Degree Survey (KiDS-1000), which doubles the survey area with nine-band optical and near-infrared photometry with respect to previous KiDS analyses. Adopting a spatially flat standard cosmological model, we find S8 = σ8(ωm/0.3)0.5 = 0.759-0.021+0.024 for our fiducial analysis, which is in 3σ tension with the prediction of the Planck Legacy analysis of the cosmic microwave background. We compare our fiducial COSEBIs (Complete Orthogonal Sets of E/B-Integrals) analysis with complementary analyses of the two-point shear correlation function and band power spectra, finding the results to be in excellent agreement. We investigate the sensitivity of all three statistics to a number of measurement, astrophysical, and modelling systematics, finding our S8 constraints to be robust and dominated by statistical errors. Our cosmological analysis of different divisions of the data passes the Bayesian internal consistency tests, with the exception of the second tomographic bin. As this bin encompasses low-redshift galaxies, carrying insignificant levels of cosmological information, we find that our results are unchanged by the inclusion or exclusion of this sample.

Citation

Asgari, M., Lin, C. A., Joachimi, B., Giblin, B., Heymans, C., Hildebrandt, H., …Valentijn, E. (2021). KiDS-1000 cosmology: Cosmic shear constraints and comparison between two point statistics. Astronomy and Astrophysics, 645, Article A104. https://doi.org/10.1051/0004-6361/202039070

Journal Article Type Article
Acceptance Date Oct 12, 2020
Online Publication Date Jan 22, 2021
Publication Date 2021-01
Deposit Date Apr 5, 2022
Publicly Available Date Mar 28, 2024
Journal Astronomy and Astrophysics
Print ISSN 0004-6361
Electronic ISSN 1432-0746
Publisher EDP Sciences
Peer Reviewed Peer Reviewed
Volume 645
Article Number A104
DOI https://doi.org/10.1051/0004-6361/202039070
Public URL https://hull-repository.worktribe.com/output/3965018

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Copyright Statement
Reproduced with permission from Astronomy & Astrophysics, © ESO 2021




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