KiDS-1000 Cosmology: Constraints beyond flat ΛCDM
Springer Link (Chiba Institute of Technology)
Abstract
We present constraints on extensions to the standard cosmological model of a spatially flat Universe governed by general relativity, a cosmological constant (Λ), and cold dark matter (CDM) by varying the spatial curvature ΩK, the sum of the neutrino masses ∑mν, the dark energy equation of state parameter w, and the Hu-Sawicki f(R) gravity fR0 parameter. With the combined 3 × 2 pt measurements of cosmic shear from the Kilo-Degree Survey (KiDS-1000), galaxy clustering from the Baryon Oscillation Spectroscopic Survey (BOSS), and galaxy-galaxy lensing from the overlap between KiDS-1000, BOSS, and the spectroscopic 2-degree Field Lensing Survey, we find results that are fully consistent with a flat ΛCDM model with $ \Omega_K=0.011^{+0.054}_{-0.057} $, ∑mν < 1.76 eV (95% CL), and $ \mathit{w}=-0.99^{+0.11}_{-0.13} $. The fR0 parameter is unconstrained in our fully non-linear f(R) cosmic shear analysis. Considering three different model selection criteria, we find no clear preference for either the fiducial flat ΛCDM model or any of the considered extensions. In addition to extensions to the flat ΛCDM parameter space, we also explore restrictions to common subsets of the flat ΛCDM parameter space by fixing the amplitude of the primordial power spectrum to the Planck best-fit value, as well as adding external data from supernovae and lensing of the cosmic microwave background (CMB). Neither the beyond-ΛCDM models nor the imposed restrictions explored in this analysis are able to resolve the ∼3σ tension in S8 between the 3 × 2 pt constraints and the Planck temperature and polarisation data, with the exception of wCDM, where the S8 tension is resolved. The tension in the wCDM case persists, however, when considering the joint S8 − w parameter space. The joint flat ΛCDM CMB lensing and 3 × 2 pt analysis is found to yield tight constraints on $ \Omega_{\mathrm{m}}=0.307^{+0.008}_{-0.013} $, $ \sigma_8=0.769^{+0.022}_{-0.010} $, and $ S_8=0.779^{+0.013}_{-0.013} $.
Authors 25
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Royal Observatory · University of Edinburgh
Affiliation as printed
Institute for Astronomy , University of Edinburgh , Royal Observatory , Blackford Hill , Edinburgh EH9 3HJ , UK
Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
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Royal Observatory · University of Edinburgh
Affiliation as printed
Institute for Astronomy , University of Edinburgh , Royal Observatory , Blackford Hill , Edinburgh EH9 3HJ , UK
Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
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Swinburne University of Technology
Affiliation as printed
Centre for Astrophysics & Supercomputing , Swinburne University of Technology , PO Box 218 , Hawthorn , VIC 3122 , Australia
Centre for Astrophysics & Supercomputing, Swinburne University of Technology, PO Box 218 Hawthorn, VIC 3122, Australia
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Royal Observatory · University of Edinburgh
Affiliation as printed
Institute for Astronomy , University of Edinburgh , Royal Observatory , Blackford Hill , Edinburgh EH9 3HJ , UK
Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
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Royal Observatory · Ruhr University Bochum · University of Edinburgh
Affiliation as printed
Institute for Astronomy , University of Edinburgh , Royal Observatory , Blackford Hill , Edinburgh EH9 3HJ , UK
Ruhr-Universität Bochum , Astronomisches Institut , German Centre for Cosmological Lensing (GCCL) , Universitätsstr. 150 , 44801 Bochum , Germany
Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
Ruhr-Universität Bochum, Astronomisches Institut, German Centre for Cosmological Lensing (GCCL), Universitätsstr. 150, 44801 Bochum, Germany
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Affiliation as printed
Ruhr-Universität Bochum , Astronomisches Institut , German Centre for Cosmological Lensing (GCCL) , Universitätsstr. 150 , 44801 Bochum , Germany
Ruhr-Universität Bochum, Astronomisches Institut, German Centre for Cosmological Lensing (GCCL), Universitätsstr. 150, 44801 Bochum, Germany
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Affiliation as printed
Department of Physics and Astronomy , University College London , Gower Street , London WC1E 6BT , UK
Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK
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Max Planck Institute for Extraterrestrial Physics
Affiliation as printed
Max-Planck-Institut für Extraterrestrische Physik , Postfach 1312 , Giessenbachstrasse 1 , 85741 Garching , Germany
Max-Planck-Institut für Extraterrestrische Physik, Postfach 1312, Giessenbachstrasse 1, 85741 Garching, Germany
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Affiliation as printed
Ruhr-Universität Bochum , Astronomisches Institut , German Centre for Cosmological Lensing (GCCL) , Universitätsstr. 150 , 44801 Bochum , Germany
Ruhr-Universität Bochum, Astronomisches Institut, German Centre for Cosmological Lensing (GCCL), Universitätsstr. 150, 44801 Bochum, Germany
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Center for Theoretical Physics · Polish Academy of Sciences
Affiliation as printed
Center for Theoretical Physics , Polish Academy of Sciences , Al. Lotników 32/46 , 02-668 Warsaw , Poland
Center for Theoretical Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland
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Affiliation as printed
Département de Physique Théorique , Université de Genève , 24 Quai Ernest Ansermet , 1211 Genève 4 , Switzerland
Département de Physique Théorique, Université de Genève, 24 Quai Ernest Ansermet, 1211 Genève 4, Switzerland
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Institute of Space Sciences · Institut d'Estudis Espacials de Catalunya
Affiliation as printed
Institut d'Estudis Espacials de Catalunya (IEEC) , Carrer Gran Capita 2 , 08034 Barcelona , Spain
Institute of Space Sciences (ICE , CSIC) , Campus UAB , Carrer de Can Magrans , s/n , 08193 Barcelona , Spain
Institut d'Estudis Espacials de Catalunya (IEEC), Carrer Gran Capita 2, 08034 Barcelona, Spain
Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n, 08193 Barcelona, Spain
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Affiliation as printed
Ruhr-Universität Bochum , Astronomisches Institut , German Centre for Cosmological Lensing (GCCL) , Universitätsstr. 150 , 44801 Bochum , Germany
Ruhr-Universität Bochum, Astronomisches Institut, German Centre for Cosmological Lensing (GCCL), Universitätsstr. 150, 44801 Bochum, Germany
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Affiliation as printed
Argelander-Institut für Astronomie , Universität Bonn , Auf dem Hügel 71 , 53121 Bonn , Germany
Argelander-Institut für Astronomie, Universität Bonn, Auf dem Hügel 71, 53121 Bonn, Germany
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Royal Observatory · University of Edinburgh
Affiliation as printed
Institute for Astronomy , University of Edinburgh , Royal Observatory , Blackford Hill , Edinburgh EH9 3HJ , UK
Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
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Swinburne University of Technology
Affiliation as printed
Centre for Astrophysics & Supercomputing , Swinburne University of Technology , PO Box 218 , Hawthorn , VIC 3122 , Australia
Centre for Astrophysics & Supercomputing, Swinburne University of Technology, PO Box 218 Hawthorn, VIC 3122, Australia
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Leiden University · Leiden Observatory
Affiliation as printed
Leiden Observatory , Leiden University , Niels Bohrweg 2 , 2333 CA Leiden , The Netherlands
Leiden Observatory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands
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Affiliation as printed
Department of Physics , University of Oxford , Denys Wilkinson Building , Keble Road , Oxford OX1 3RH , UK
Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK
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Affiliation as printed
Department of Astrophysical Sciences , Princeton University , 4 Ivy Lane , Princeton , NJ 08544 , USA
Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USA
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Affiliation as printed
Ruhr-Universität Bochum , Astronomisches Institut , German Centre for Cosmological Lensing (GCCL) , Universitätsstr. 150 , 44801 Bochum , Germany
Ruhr-Universität Bochum, Astronomisches Institut, German Centre for Cosmological Lensing (GCCL), Universitätsstr. 150, 44801 Bochum, Germany
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Leiden University · Leiden Observatory
Affiliation as printed
Leiden Observatory , Leiden University , Niels Bohrweg 2 , 2333 CA Leiden , The Netherlands
Leiden Observatory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands
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Australian National University
Affiliation as printed
Centre for Gravitational Astrophysics , College of Science , Australian National University , Acton , ACT 2601 , Australia
Research School of Astronomy and Astrophysics , Australian National University , Canberra , ACT 2600 , Australia
Centre for Gravitational Astrophysics, College of Science, Australian National University, Acton, ACT 2601, Australia
Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 2600, Australia
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Affiliation as printed
Département de Physique Théorique , Université de Genève , 24 Quai Ernest Ansermet , 1211 Genève 4 , Switzerland
Département de Physique Théorique, Université de Genève, 24 Quai Ernest Ansermet, 1211 Genève 4, Switzerland
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Institut de Ciències del Cosmos · Universitat de Barcelona
Affiliation as printed
Institut de Ciències del Cosmos , Universitat de Barcelona , Martí Franquès 1 , 08028 Barcelona , Spain
Institut de Ciències del Cosmos, Universitat de Barcelona, Martí Franquès 1, 08028 Barcelona, Spain
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Korea Astronomy and Space Science Institute
Affiliation as printed
Korea Astronomy and Space Science Institute , 776 Daedeokdae-ro , Yuseong-gu , Daejeon 34055 , Republic of Korea
Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of Korea
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