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Title:
DES Y1 Results: validating cosmological parameter estimation using simulated Dark Energy Surveys
Authors:
MacCrann, N.; DeRose, J.; Wechsler, R. H.; Blazek, J.; Gaztanaga, E.; Crocce, M.; Rykoff, E. S.; Becker, M. R.; Jain, B.; Krause, E.; Eifler, T. F.; Gruen, D.; Zuntz, J.; Troxel, M. A.; Elvin-Poole, J.; Prat, J.; Wang, M.; Dodelson, S.; Kravtsov, A.; Fosalba, P.; Busha, M. T.; Evrard, A. E.; Huterer, D.; Abbott, T. M. C.; Abdalla, F. B.; Allam, S.; Annis, J.; Avila, S.; Bernstein, G. M.; Brooks, D.; Buckley-Geer, E.; Burke, D. L.; Carnero Rosell, A.; Carrasco Kind, M.; Carretero, J.; Castander, F. J.; Cawthon, R.; Cunha, C. E.; D'Andrea, C. B.; da Costa, L. N.; Davis, C.; De Vicente, J.; Diehl, H. T.; Doel, P.; Frieman, J.; García-Bellido, J.; Gerdes, D. W.; Gruendl, R. A.; Gutierrez, G.; Hartley, W. G.; Hollowood, D.; Honscheid, K.; Hoyle, B.; James, D. J.; Jeltema, T.; Kirk, D.; Kuehn, K.; Kuropatkin, N.; Lima, M.; Maia, M. A. G.; Marshall, J. L.; Menanteau, F.; Miquel, R.; Plazas, A. A.; Roodman, A.; Sanchez, E.; Scarpine, V.; Schubnell, M.; Sevilla-Noarbe, I.; Smith, M.; Smith, R. C.; Soares-Santos, M.; Sobreira, F.; Suchyta, E.; Swanson, M. E. C.; Tarle, G.; Thomas, D.; Walker, A. R.; Weller, J.;
Affiliation:
AA(Center for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USA; Department of Physics, The Ohio State University, Columbus, OH 43210, USA), AB(Department of Physics, Stanford University, 382 Via Pueblo Mall, Stanford, CA 94305, USA; Kavli Institute for Particle Astrophysics & Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USA), AC(Department of Physics, Stanford University, 382 Via Pueblo Mall, Stanford, CA 94305, USA; Kavli Institute for Particle Astrophysics & Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USA; SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA), AD(Center for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USA; Institute of Physics, Laboratory of Astrophysics, École Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, 1290 Versoix, Switzerland), AE(Institut d'Estudis Espacials de Catalunya (IEEC), E-08193 Barcelona, Spain; Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n, E-08193 Barcelona, Spain), AF(Institut d'Estudis Espacials de Catalunya (IEEC), E-08193 Barcelona, Spain; Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n, E-08193 Barcelona, Spain), AG(Kavli Institute for Particle Astrophysics & Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USA; SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA), AH(Department of Physics, Stanford University, 382 Via Pueblo Mall, Stanford, CA 94305, USA; Kavli Institute for Particle Astrophysics & Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USA), AI(Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA), AJ(Steward Observatory, Department of Astronomy/, 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA; Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA), AK(Steward Observatory, Department of Astronomy/, 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA; Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA), AL(Kavli Institute for Particle Astrophysics & Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USA; SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA), AM(Institute for Astronomy, University of Edinburgh, Edinburgh EH9 3HJ, UK), AN(Center for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USA; Department of Physics, The Ohio State University, Columbus, OH 43210, USA), AO(Jodrell Bank Center for Astrophysics, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK), AP(Institut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra, Barcelona, Spain), AQ(Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USA), AR(Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania, PA 15312, USA), AS(Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA), AT(Institut d'Estudis Espacials de Catalunya (IEEC), E-08193 Barcelona, Spain; Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n, E-08193 Barcelona, Spain), AU(Kavli Institute for Particle Astrophysics & Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USA), AV(Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA; Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA), AW(Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA), AX(Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, Casilla 603, La Serena, Chile), AY(Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UK; Department of Physics and Electronics, Rhodes University, PO Box 94, Grahamstown, 6140, South Africa), AZ(Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USA), BA(Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USA), BB(Institute of Cosmology & Gravitation, University of Portsmouth, Portsmouth, PO1 3FX, UK), BC(Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA), BD(Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UK), BE(Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USA), BF(Kavli Institute for Particle Astrophysics & Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USA; SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA), BG(Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ-20921-400, Brazil; Observatório Nacional, Rua Gal. José Cristino 77, Rio de Janeiro, RJ-20921-400, Brazil), BH(Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, IL 61801, USA; National Center for Supercomputing Applications, 1205 West Clark St., Urbana, IL 61801, USA), BI(Institut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra, Barcelona, Spain), BJ(Institut d'Estudis Espacials de Catalunya (IEEC), E-08193 Barcelona, Spain; Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n, E-08193 Barcelona, Spain), BK(Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA), BL(Kavli Institute for Particle Astrophysics & Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USA), BM(Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA), BN(Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ-20921-400, Brazil; Observatório Nacional, Rua Gal. José Cristino 77, Rio de Janeiro, RJ-20921-400, Brazil), BO(Kavli Institute for Particle Astrophysics & Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USA), BP(Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain), BQ(Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USA), BR(Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UK), BS(Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USA; Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA), BT(Instituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid, E-28049 Madrid, Spain), BU(Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA; Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA), BV(Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, IL 61801, USA; National Center for Supercomputing Applications, 1205 West Clark St., Urbana, IL 61801, USA), BW(Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USA), BX(Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UK; Department of Physics, ETH Zurich, Wolfgang-Pauli-Strasse 16, CH-8093 Zurich, Switzerland), BY(Santa Cruz Institute for Particle Physics, Santa Cruz, CA 95064, USA), BZ(Center for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USA; Department of Physics, The Ohio State University, Columbus, OH 43210, USA), CA(Max Planck Institute for Extraterrestrial Physics, Giessenbachstrasse, D-85748 Garching, Germany; Fakultät für Physik, Universitäts-Sternwarte, Ludwig-Maximilians Universität München, Scheinerstr. 1, D-81679 München, Germany), CB(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA), CC(Santa Cruz Institute for Particle Physics, Santa Cruz, CA 95064, USA), CD(Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UK), CE(Australian Astronomical Observatory, North Ryde, NSW 2113, Australia), CF(Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USA), CG(Departamento de Física Matemática, Instituto de Física, Universidade de São Paulo, CP 66318, São Paulo, SP 05314-970, Brazil; Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ-20921-400, Brazil), CH(Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ-20921-400, Brazil; Observatório Nacional, Rua Gal. José Cristino 77, Rio de Janeiro, RJ-20921-400, Brazil), CI(George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, and Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USA), CJ(Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, IL 61801, USA; National Center for Supercomputing Applications, 1205 West Clark St., Urbana, IL 61801, USA), CK(Institució Catalana de Recerca i Estudis Avançats, E-08010 Barcelona, Spain; Institut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra, Barcelona, Spain), CL(Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA), CM(Kavli Institute for Particle Astrophysics & Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USA; SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA), CN(Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain), CO(Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USA), CP(Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA), CQ(Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain), CR(School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UK), CS(Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, Casilla 603, La Serena, Chile), CT(Physics Department, Brandeis University, 415 South Street, Waltham, MA 02453, USA), CU(Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, E-13083-859, Campinas, SP, Brazil; Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ-20921-400, Brazil), CV(Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA), CW(National Center for Supercomputing Applications, 1205 West Clark St., Urbana, IL 61801, USA), CX(Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA), CY(Institute of Cosmology & Gravitation, University of Portsmouth, Portsmouth, PO1 3FX, UK), CZ(Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, Casilla 603, La Serena, Chile), DA(Excellence Cluster Universe, Boltzmannstr. 2, D-85748 Garching, Germany; Max Planck Institute for Extraterrestrial Physics, Giessenbachstrasse, D-85748 Garching, Germany; Fakultät für Physik, Universitäts-Sternwarte, Ludwig-Maximilians Universität München, Scheinerstr. 1, D-81679 München, Germany)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 480, Issue 4, p.4614-4635 (MNRAS Homepage)
Publication Date:
11/2018
Origin:
OUP
Astronomy Keywords:
large-scale structure of Universe, cosmological parameters
Abstract Copyright:
2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society
DOI:
10.1093/mnras/sty1899
Bibliographic Code:
2018MNRAS.480.4614M

Abstract

We use mock galaxy survey simulations designed to resemble the Dark Energy Survey Year 1 (DES Y1) data to validate and inform cosmological parameter estimation. When similar analysis tools are applied to both simulations and real survey data, they provide powerful validation tests of the DES Y1 cosmological analyses presented in companion papers. We use two suites of galaxy simulations produced using different methods, which therefore provide independent tests of our cosmological parameter inference. The cosmological analysis we aim to validate is presented in DES Collaboration et al. (2017) and uses angular two-point correlation functions of galaxy number counts and weak lensing shear, as well as their cross-correlation, in multiple redshift bins. While our constraints depend on the specific set of simulated realisations available, for both suites of simulations we find that the input cosmology is consistent with the combined constraints from multiple simulated DES Y1 realizations in the Omegam - sigma8 plane. For one of the suites, we are able to show with high confidence that any biases in the inferred S8 = sigma8(Omegam/0.3)0.5 and Omegam are smaller than the DES Y1 1 - sigma uncertainties. For the other suite, for which we have fewer realizations, we are unable to be this conclusive; we infer a roughly 60 per cent (70 per cent) probability that systematic bias in the recovered Omegam (S8) is sub-dominant to the DES Y1 uncertainty. As cosmological analyses of this kind become increasingly more precise, validation of parameter inference using survey simulations will be essential to demonstrate robustness.
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