## arXiv Analytics

### arXiv:2007.15633 [astro-ph.CO]AbstractReferencesReviewsResources

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

Published 2020-07-30Version 1

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 $\Lambda$CDM model, we find $S_8 = \sigma_8 (\Omega_{\rm m}/0.3)^{0.5} = 0.759^{+0.024}_{-0.021}$ for our fiducial analysis, which is in $3\sigma$ 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 $S_8$ 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.

Comments: 32 pages, 12 figures, 6 tables, submitted to A&A. This paper is part of the KiDS-1000 series of papers, accompanying Heymans, Tr\"oster et al. and Hildebrandt et al. appearing on the arXiv today, joining Joachimi et al. (arXiv:2007.01844) and Giblin et al. (arXiv:2007.01845). Online KiDS-1000 talks and seminars can be viewed at http://kids.strw.leidenuniv.nl/KiDS-1000.php
Categories: astro-ph.CO
Related articles: Most relevant | Search more
arXiv:1807.05003 [astro-ph.CO] (Published 2018-07-13)
Comparison of results on $N_\mathrm{eff}$ from various Planck likelihoods
arXiv:1805.01968 [astro-ph.CO] (Published 2018-05-05)
Comparison of physical and observational galaxy cluster modelling
arXiv:1710.09397 [astro-ph.CO] (Published 2017-10-25)
Prediction of the 21-cm signal from reionization: comparison between 3D and 1D radiative transfer schemes