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U.S. Department of Energy
U.S. National Science Foundation
Ministry of Science and Education of Spain
Science and Technology Facilities Council of the United Kingdom
Higher Education Funding Council for England
National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign
Kavli Institute of Cosmological Physics at the University of Chicago
Center for Cosmology and Astro-Particle Physics at Ohio State University
Mitchell Institute for Fundamental Physics and Astronomy at Texas AM University
Financiadora de Estudos e Projetos
Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Ministerio da Ciencia, Tecnologia e Inovacao
Deutsche Forschungsgemeinschaft
Argonne National Laboratory
University of California at Santa Cruz
University of Cambridge
Centro de Investigaciones Energeticas
Medioambientales y Tecnologicas-Madrid
University of Chicago
University College London
DES-Brazil Consortium
University of Edinburgh
Eidgenossische Technische Hochschule Zurich
Fermi National Accelerator Laboratory
University of Illinois at Urbana-Champaign
Institut de Ciencies de l'Espai
Institut de Fisica d'Altes Energies
Lawrence Berkeley National Laboratory
Ludwig-Maximilians Universitat Munchen
Excellence Cluster Universe
University of Michigan
National Optical Astronomy Observatory
University of Nottingham
Ohio State University
University of Pennsylvania
University of Portsmouth
SLAC National Accelerator Laboratory, Stanford University
University of Sussex
Texas A M University
OzDES Membership Consortium
National Science Foundation
MINECO
European Union
Centres de Recerce de Catalunya (CERCA) program of the Generalitat de Catalunya
European Research Council under the European Union's Seventh Framework Program (FP7)
Australian Research Council Centre of Excellence for All-sky Astrophysics
U.S. Department of Energy, Office of Science, Office of High Energy Physics
Office of Science of the U.S. Department of Energy
We present cosmological results from a combined analysis of galaxy clustering and weak gravitational lensing, using 1321 deg(2) of griz imaging data from the first year of the Dark Energy Survey (DES Y1). We combine three two-point functions: (i) the cosmic shear correlation function of 26 million source galaxies in four redshift bins, (ii) the galaxy angular autocorrelation function of 650,000 luminous red galaxies in five redshift bins, and (iii) the galaxy-shear cross-correlation of luminous red galaxy positions and source galaxy shears. To demonstrate the robustness of these results, we use independent pairs of galaxy shape, photometric-redshift estimation and validation, and likelihood analysis pipelines. To prevent confirmation bias, the bulk of the analysis was carried out while blind to the true results; we describe an extensive suite of systematics checks performed and passed during this blinded phase. The data are modeled in flat Lambda CDM and wCDM cosmologies, marginalizing over 20 nuisance parameters, varying 6 (for Lambda CDM) or 7 (for wCDM) cosmological parameters including the neutrino mass density and including the 457 x 457 element analytic covariance matrix. We find consistent cosmological results from these three two-point functions and from their combination obtain S-8 equivalent to sigma(8) (Omega(m)/0.3)(0.5) = 0.773(-0.020)(+0.026) and Omega(m) = 0.267(-0.017)(+0.030) for Lambda CDM; for wCDM, we find S-8 = 0.782(-0.024)(+0.036) , Omega(m) = 0.284(-0.030)(+0.033), and w = -0.82(-0.20)(+0.21) at 68% C.L. The precision of these DES Y1 constraints rivals that from the Planck cosmic microwave background measurements, allowing a comparison of structure in the very early and late Universe on equal terms. Although the DES Y1 best-fit values for S-8 and Omega(m) are lower than the central values from Planck for both Lambda CDM and wCDM, the Bayes factor indicates that the DES Y1 and Planck data sets are consistent with each other in the context of Lambda CDM. Combining DES Y1 with Planck, baryonic acoustic oscillation measurements from SDSS, 6dF, and BOSS and type Ia supernovae from the Joint Lightcurve Analysis data set, we derive very tight constraints on cosmological parameters: S-8 = 0.802 +/- 0.012 and Omega(m) = 0.298 +/- 0.007 in Lambda CDM and w = -1.00(-0.04)(+0.05) in wCDM. Upcoming Dark Energy Survey analyses will provide more stringent tests of the Lambda CDM model and extensions such as a time-varying equation of state of dark energy or modified gravity.
Cerro Tololo Interamer Observ, Natl Opt Astron Observ, Casilla 603, La Serena, Chile
Rhodes Univ, Dept Phys & Elect, POB 94, ZA-6140 Grahamstown, South Africa
UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England
CSIC, IEEC, Inst Space Sci, Campus UAB,Carrer Can Magrans S-N, Barcelona 08193, Spain
Barcelona Inst Sci & Technol, IFAE, Campus UAB, Bellaterra 08193, Barcelona, Spain
Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA
Stanford Univ, Dept Phys, 382 Via Pueblo Mall, Stanford, CA 94305 USA
Swiss Fed Inst Technol, Dept Phys, Wolfgang Pauli Str 16, CH-8093 Zurich, Switzerland
Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia
ARC Ctr Excellence All Sky Astrophys CAASTRO, Perth, WA, Australia
Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England
UAM, CSIC, Inst Fis Teor, Madrid 28049, Spain
Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England
Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England
Univ Cambridge, Kavli Inst Cosmol, Madingley Rd, Cambridge CB3 0HA, England
Univ North Dakota, Dept Phys & Astrophys, Witmer Hall, Grand Forks, ND 58202 USA
Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, POB 2450, Stanford, CA 94305 USA
SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA
Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA
LSST, 933 North Cherry Ave, Tucson, AZ 85721 USA
CNRS, Inst Astrophys Paris, UMR 7095, F-75014 Paris, France
UPMC Univ Paris 06, Sorbonne Univ, Inst Astrophys Paris, UMR 7095, F-75014 F- Paris, France
Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA
EPFL, Lab Astrophys, Inst Phys, Observ Sauverny, CH-1290 Versoix, Switzerland
Ohio State Univ, Ctr Cosmol & Astro Particle Phys, Columbus, OH 43210 USA
Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Oxford Rd, Oxford M13 9PL, England
Univ Estadual Paulista, Inst Fis Teor, ICTP South Amer Inst Fundamental Res, Sao Paulo, Brazil
Lab Interinst Astron LIneA, Rua Gal Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil
Observ Nacl, Rua Gal Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil
Natl Ctr Supercomp Applicat, 1205 West Clark St, Urbana, IL 61801 USA
Univ Illinois, Dept Astron, 1002 West Green St, Urbana, IL 61801 USA
Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England
Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England
Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
Ctr Invest Energet Medioambient & Tecnol CIEMAT, Madrid, Spain
Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamenta, College Stn, TX 77843 USA
Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA
IIT Hyderabad, Dept Phys, Kandi 502285, Telangana, India
Excellence Cluster Universe, Boltzmannstr 2, D-85748 Garching, Germany
Ludwig Maximilians Univ Munchen, Fac Phys, Scheinerstr 1, D-81679 Munich, Germany
CALTECH, Dept Phys, Pasadena, CA 91125 USA
CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA
Ohio State Univ, Dept Phys, Columbus, OH 43210 USA
Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA
Univ Edinburgh, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland
Ludwig Maximilians Univ Munchen, Sternwarte, Fak Phys, Scheinerstr 1, D-81679 Munich, Germany
Max Planck Inst Extraterr Phys, Giessenbachstr, D-85748 Garching, Germany
Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia
Univ Calif Berkeley, Dept Astron, 501 Campbell Hall, Berkeley, CA 94720 USA
Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA
Univ Washington, Astron Dept, Box 351580, Seattle, WA 98195 USA
Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA
Univ Sao Paulo, Inst Fis, Dept Fis Matemat, CP 66318, BR-05314970 Sao Paulo, SP, Brazil
Australian Astron Observ, N Ryde, NSW 2113, Australia
Argonne Natl Lab, 9700 South Cass Ave, Lemont, IL 60439 USA
Ctrt Brasileiro Pesquisas Fisicas, ICRA, Rua Dr Xavier Sigaud 150, BR-22290 Rio De Janeiro, RJ, Brazil
Ohio State Univ, Dept Astron, Columbus, OH 43210 USA
Princeton Univ, Dept Astrophys Sci, Peyton Hall, Princeton, NJ 08544 USA
Inst Catalana Recerca & Estudis Avancats, E-08010 Barcelona, Spain
Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2601, Australia
Univ Sussex, Dept Phys & Astron, Pevensey Bldg, Brighton BN1 9QH, E Sussex, England
Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
Univ Fed Rio Grande do Sul, Inst Fis, Caixa Postal 15051, BR-91501970 Porto Alegre, RS, Brazil
Brookhaven Natl Lab, Bldg 510, Upton, NY 11973 USA
Austin Peay State Univ, Dept Phys Astron, POB 4608 Clarksville, Clarksville, TN 37044 USA
Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP, Brazil
Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA
Chinese Acad Sci, Purple Mt Observ, Nanjing, Jiangsu, Peoples R China
Univ Estadual Paulista, Inst Fis Teor, ICTP South Amer Inst Fundamental Res, Sao Paulo, Brazil
National Science Foundation: AST-1138766
National Science Foundation: AST-1536171
MINECO: AYA2015-71825
MINECO: ESP2015-88861
MINECO: FPA2015-68048
MINECO: SEV-2012-0234
MINECO: SEV-2016-0597
MINECO: MDM-2015-0509,
European Research Council under the European Union's Seventh Framework Program (FP7): 240672
European Research Council under the European Union's Seventh Framework Program (FP7): 291329
European Research Council under the European Union's Seventh Framework Program (FP7): 306478
Australian Research Council Centre of Excellence for All-sky Astrophysics: CE110001020
U.S. Department of Energy, Office of Science, Office of High Energy Physics: DE-AC02-07CH11359
Office of Science of the U.S. Department of Energy: DE-AC02-05CH11231
