TY - JOUR
T1 - KiDS-1000 Cosmology
T2 - Cosmic shear constraints and comparison between two point statistics
AU - Asgari, Marika
AU - Lin, Chieh-An
AU - Joachimi, Benjamin
AU - Giblin, Benjamin
AU - Heymans, Catherine
AU - Hildebrandt, Hendrik
AU - Kannawadi, Arun
AU - Stölzner, Benjamin
AU - Tröster, Tilman
AU - Busch, Jan Luca van den
AU - Wright, Angus H.
AU - Bilicki, Maciej
AU - Blake, Chris
AU - Jong, Jelte de
AU - Dvornik, Andrej
AU - Erben, Thomas
AU - Getman, Fedor
AU - Hoekstra, Henk
AU - Köhlinger, Fabian
AU - Kuijken, Konrad
AU - Miller, Lance
AU - Radovich, Mario
AU - Schneider, Peter
AU - Shan, HuanYuan
AU - Valentijn, Edwin
N1 - 33 pages, 14 figures, 7 tables, Accepted to be published in A&A. This paper is part of the KiDS-1000 series of papers: Heymans, Tr\"oster et al. (arXiv:2007.15632), Hildebrandt et al. (arXiv:2007.15635), Joachimi et al. (arXiv:2007.01844) and Giblin et al. (arXiv:2007.01845). Online KiDS-1000 talks can be viewed at http://kids.strw.leidenuniv.nl/KiDS-1000.php or the KiDS Consortium youtube page
PY - 2021/1/22
Y1 - 2021/1/22
N2 - We present cosmological constraints from a cosmic shear analysis of the fourth data release of the Kilo-Degree Survey (KiDS-1000), doubling the survey area with nine-band optical and near-infrared photometry with respect to previous KiDS analyses. Adopting a spatially flat ΛCDM model, we find S8=σ8(Ωm/0.3)0.5=0.759+0.024−0.021 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 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 pass 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.
AB - We present cosmological constraints from a cosmic shear analysis of the fourth data release of the Kilo-Degree Survey (KiDS-1000), doubling the survey area with nine-band optical and near-infrared photometry with respect to previous KiDS analyses. Adopting a spatially flat ΛCDM model, we find S8=σ8(Ωm/0.3)0.5=0.759+0.024−0.021 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 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 pass 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.
KW - astro-ph.CO
U2 - 10.1051/0004-6361/202039070
DO - 10.1051/0004-6361/202039070
M3 - Article
VL - 645
SP - 1
EP - 31
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
SN - 0004-6361
M1 - A104
ER -