Description
Made available in DSpace on 2022-04-29T08:40:07Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-04-01
We constrain the matter density ωm and the amplitude of density fluctuations σ8 within the ΛCDM cosmological model with shear peak statistics and angular convergence power spectra using mass maps constructed from the first three years of data of the Dark Energy Survey (DES Y3). We use tomographic shear peak statistics, including cross-peaks: peak counts calculated on maps created by taking a harmonic space product of the convergence of two tomographic redshift bins. Our analysis follows a forward-modelling scheme to create a likelihood of these statistics using N-body simulations, using a Gaussian process emulator. We take into account the uncertainty from the remaining, largely unconstrained ΛCDM parameters (ωb, ns, and h). We include the following lensing systematics: multiplicative shear bias, photometric redshift uncertainty, and galaxy intrinsic alignment. Stringent scale cuts are applied to avoid biases from unmodelled baryonic physics. We find that the additional non-Gaussian information leads to a tightening of the constraints on the structure growth parameter yielding S8 σ8√Ωm/0.3=0.797-0.013+0.015 (68 per cent confidence limits), with a precision of 1.8 per cent, an improvement of 38 per cent compared to the angular power spectra only case. The results obtained with the angular power spectra and peak counts are found to be in agreement with each other and no significant difference in S8 is recorded. We find a mild tension of 1.5 σ between our study and the results from Planck 2018, with our analysis yielding a lower S8. Furthermore, we observe that the combination of angular power spectra and tomographic peak counts breaks the degeneracy between galaxy intrinsic alignment AIA and S8, improving cosmological constraints. We run a suite of tests concluding that our results are robust and consistent with the results from other studies using DES Y3 data.
Institute for Particle Physics and Astrophysics Department of Physics Eth Zuurich, Wolfgang Pauli Strasse 27
Department of Physics and Astronomy University of Pennsylvania
Department of Physics and Astronomy University College London, Gower Street
Department of Astronomy and Astrophysics University of Chicago
Kavli Institute for Cosmological Physics University of Chicago
Department of Physics and Astronomy Pevensey Building University of Sussex
Laboratoire de Physique de l'Ecole Normale Superieure Ens Universite Psl Cnrs Sorbonne Universite Université de Paris
Institute of Cosmology and Gravitation University of Portsmouth
Argonne National Laboratory, 9700 South Cass Avenue
Kavli Institute for Particle Astrophysics and Cosmology Stanford University, P. O. Box 2450
Physics Department 2320 Chamberlin Hall University of WisconsinMadison, 1150 University Avenue
Department of Physics Carnegie Mellon University
Department of Physics Duke University
Center for Cosmology and Astro-Particle Physics The Ohio State University
Lawrence Berkeley National Laboratory, 1 Cyclotron Road
Nsf Ai Planning Institute for Physics of the Future Carnegie Mellon University
Department of Physics The Ohio State University
Santa Cruz Institute for Particle Physics
Jet Propulsion Laboratory California Institute of Technology, 4800 Oak Grove Dr.
Faculty of Physics Ludwig-Maximilians-Universitat, Scheinerstr. 1
Department of Physics University of Oxford Denys Wilkinson Building, Keble Road
Jodrell Bank Center for Astrophysics School of Physics and Astronomy University of Manchester, Oxford Road
Department of Physics University of Michigan
Department of Applied Mathematics and Theoretical Physics University of Cambridge
Perimeter Institute for Theoretical Physics, 31 Caroline St. North
Department of Physics Stanford University 382 Via Pueblo Mall
Slac National Accelerator Laboratory
Instituto de Fisica Gleb Wataghin Universidade Estadual de Campinas, SP
Brookhaven National Laboratory Bldg 510
Institut d'Estudis Espacials de Catalunya (IEEC)
Institute of Space Sciences (ICE CSIC) Campus Uab, Carrer de Can Magrans, s/n
Laboratorio Interinstitucional de E-Astronomia-LIneA, Rua Gal. José Cristino 77, RJ
Fermi National Accelerator Laboratory, P. O. Box 500
Instituto de Física Teorica Universidade Estadual Paulista
Cnrs Umr 7095 Institut d'Astrophysique de Paris
Sorbonne Universites Upmc Univ Paris 06 Umr 7095 Institut d'Astrophysique de Paris
Center for Astrophysical Surveys National Center for Supercomputing Applications, 1205 West Clark St.
Department of Astronomy University of Illinois at Urbana-Champaign, 1002 W. Green Street
Institut de Física d'Altes Energies (IFAE) The Barcelona Institute of Science and Technology Campus Uab, Bellaterra
University of Nottingham School of Physics and Astronomy
Astronomy Unit Department of Physics University of Trieste, via Tiepolo 11
INAF-Osservatorio Astronomico di Trieste, via G. B. Tiepolo 11
Institute for Fundamental Physics of the Universe, Via Beirut 2
Observatorio Nacional, Rua Gal. José Cristino 77, RJ
Hamburger Sternwarte Universitat Hamburg, Gojenbergsweg 112
School of Mathematics and Physics University of Queensland
Centro de Investigaciones Energeticas Medioambientales y Tecnologicas (CIEMAT)
Department of Physics Iit Hyderabad, Telangana
Department of Astronomy University of Michigan
Institute of Theoretical Astrophysics University of Oslo, P.O. Box 1029 Blindern
Instituto de Fisica Teorica UAM/CSIC Universidad Autonoma de Madrid
Institute of Astronomy University of Cambridge, Madingley Road
Kavli Institute for Cosmology University of Cambridge, Madingley Road
Center for Astrophysics Harvard and Smithsonian, 60 Garden Street
Australian Astronomical Optics Macquarie University
Lowell Observatory, 1400 Mars Hill Rd
Centre for Gravitational Astrophysics College of Science The Australian National University
The Research School of Astronomy and Astrophysics Australian National University
Departamento de Física Matematica Instituto de Física Universidade de Sao Paulo, SP
George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy Department of Physics and Astronomy Texas A &m University
Department of Astrophysical Sciences Princeton University Peyton Hall
Institucio Catalana de Recerca i Estudis Avancats
Department of Astronomy University of California Berkeley 501 Campbell Hall
School of Physics and Astronomy University of Southampton
Computer Science and Mathematics Division Oak Ridge National Laboratory
Max Planck Institute for Extraterrestrial Physics, Giessenbachstrasse
Universitats-Sternwarte Fakultat fur Physik Ludwig-Maximilians Universitat Munchen, Scheinerstr. 1
Instituto de Física Teorica Universidade Estadual Paulista
