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Made available in DSpace on 2022-04-29T08:40:12Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-04-01
Cosmological information from weak lensing surveys is maximized by sorting source galaxies into tomographic redshift subsamples. Any uncertainties on these redshift distributions must be correctly propagated into the cosmological results. We present hyperrank, a new method for marginalizing over redshift distribution uncertainties, using discrete samples from the space of all possible redshift distributions, improving over simple parametrized models. In hyperrank, the set of proposed redshift distributions is ranked according to a small (between one and four) number of summary values, which are then sampled, along with other nuisance parameters and cosmological parameters in the Monte Carlo chain used for inference. This approach can be regarded as a general method for marginalizing over discrete realizations of data vector variation with nuisance parameters, which can consequently be sampled separately from the main parameters of interest, allowing for increased computational efficiency. We focus on the case of weak lensing cosmic shear analyses and demonstrate our method using simulations made for the Dark Energy Survey (DES). We show that the method can correctly and efficiently marginalize over a wide range of models for the redshift distribution uncertainty. Finally, we compare hyperrank to the common mean-shifting method of marginalizing over redshift uncertainty, validating that this simpler model is sufficient for use in the DES Year 3 cosmology results presented in companion papers.
Jodrell Bank Centre for Astrophysics Department of Physics and Astronomy The University of Manchester
Department of Physics University of Oxford Denys Wilkinson Building, Keble Road
Institute for Astronomy University of Edinburgh
Department of Physics and Astronomy University of Pennsylvania
Argonne National Laboratory, 9700 South Cass Avenue
Institute of Space Sciences (ICE CSIC) Campus Uab Carrer de Can Magrans S/n
Institut d'Estudis Espacials de Catalunya (IEEC)
Department of Physics University of Michigan
Instituto de Física Teorica Universidade Estadual Paulista
Department of Physics Stanford University 382 Via Pueblo Mall
Kavli Institute for Particle Astrophysics &cosmology Stanford University, PO Box 2450
Slac National Accelerator Laboratory
Laboratorio Interinstitucional de E-Astronomia-LIneA, Rua Gal. Jose Cristino 77
Department of Physics Carnegie Mellon University
Center for Cosmology and Astro-Particle Physics The Ohio State University
Santa Cruz Institute for Particle Physics
Department of Astronomy University of California Berkeley 501 Campbell Hall
Jet Propulsion Laboratory California Institute of Technology, 4800 Oak Grove Dr.
Department of Astronomy/Steward Observatory University of Arizona, 933 North Cherry Avenue
Kavli Institute for Cosmology University of Cambridge, Madingley Road
Churchill College University of Cambridge
Department of Astronomy University of Illinois at Urbana-Champaign, 1002 W. Green Street
Center for Astrophysical Surveys National Center for Supercomputing Applications, 1205 West Clark St.
Departement de Physique Theorique Center for Astroparticle Physics Université de Geneve, 24 quai Ernest Ansermet
Fermi National Accelerator Laboratory, PO Box 500
Department of Applied Mathematics and Theoretical Physics University of Cambridge
Kavli Institute for Cosmological Physics University of Chicago
Ictp South American Institute for Fundamental Research Instituto de Física Teorica Universidade Estadual Paulista
Centro de Investigaciones Energeticas Medioambientales y Tecnologicas (CIEMAT)
Brookhaven National Laboratory Bldg 510
Department of Physics Duke University
Departamento de Física Matematica Instituto de Física Universidade de Sao Paulo, CP 66318, SP
Cnrs Umr 7095 Institut d'Astrophysique de Paris
Sorbonne Universites Upmc Univ Paris 06 Umr 7095 Institut d'Astrophysique de Paris
Department of Physics &astronomy University College London, Gower Street
Instituto de Astrofisica de Canarias, Tenerife
Universidad de la Laguna Dpto. Astrofísica, Tenerife
Institut de Física d'Altes Energies (IFAE) The Barcelona Institute of Science and Technology Campus Uab, Bellaterra
Physics Department 2320 Chamberlin Hall University of WisconsinMadison, 1150 University Avenue
INAF-Osservatorio Astronomico di Trieste, via G. B. Tiepolo 11
Institute for Fundamental Physics of the Universe, Via Beirut 2
Faculty of Physics Ludwig-Maximilians-Universitat, Scheinerstr. 1
Department of Physics The Ohio State University
Institute of Theoretical Astrophysics University of Oslo, PO Box 1029 Blindern
Instituto de Fisica Teorica UAM/CSIC Universidad Autonoma de Madrid
Department of Astronomy University of Michigan
School of Mathematics and Physics University of Queensland
Max Planck Institute for Extraterrestrial Physics, Giessenbachstrasse
Universitats-Sternwarte Fakultat fur Physik Ludwig-Maximilians Universitat Munchen, Scheinerstr. 1
Center for Astrophysics | Harvard &smithsonian, 60 Garden Street
Australian Astronomical Optics Macquarie University
Lowell Observatory, 1400 Mars Hill Rd
Institucio Catalana de Recerca i Estudis Avancats
Perimeter Institute for Theoretical Physics, 31 Caroline St. North
Institute of Astronomy University of Cambridge, Madingley Road
Observatorio Nacional, Rua Gal. José Cristino 77
Department of Astrophysical Sciences Princeton University Peyton Hall
School of Physics and Astronomy University of Southampton
Computer Science and Mathematics Division Oak Ridge National Laboratory
Institute of Cosmology and Gravitation University of Portsmouth
Instituto de Física Teorica Universidade Estadual Paulista
Ictp South American Institute for Fundamental Research Instituto de Física Teorica Universidade Estadual Paulista
