Dark Energy Survey year 1 results: Cosmological constraints from galaxy clustering and weak lensing
T. M. C. AbbottCerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, Casilla 603, La Serena, ChileF. B. AbdallaDepartment of Physics and Electronics, Rhodes University, P.O. Box 94, Grahamstown 6140, South AfricaA. AlarconInstitute of Space Sciences, IEEC-CSIC, Campus UAB, Carrer de Can Magrans, s/n, 08193 Barcelona, SpainJelena AleksicInstitut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, 08193 Bellaterra (Barcelona), SpainS. AllamFermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510, USAS. W. AllenDepartment of Physics, Stanford University, 382 Via Pueblo Mall, Stanford, California 94305, USAA. AmaraDepartment of Physics, ETH Zurich, Wolfgang-Pauli-Strasse 16, CH-8093 Zurich, SwitzerlandJ. AnnisFermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510, USAJ. AsoreyARC Centre of Excellence for All-sky Astrophysics (CAASTROS. ÀvilaInstituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid, 28049 Madrid, SpainDavid BaconInstitute of Cosmology & Gravitation, University of Portsmouth, Portsmouth PO1 3FX, United KingdomE. BalbinotDepartment of Physics, University of Surrey, Guildford GU2 7XH, United KingdomM. BanerjiInstitute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, United KingdomNilanjan BanikFermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510, USAWayne BarkhouseUniversity of North Dakota, Department of Physics and Astrophysics, Witmer Hall, Grand Forks, North Dakota 58202, USAMichael BaumerKavli Institute for Particle Astrophysics & Cosmology, P.O. Box 2450, Stanford University, Stanford, California 94305, USAEric J. BaxterDepartment of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USAK. BechtolLSST, 933 North Cherry Avenue, Tucson, Arizona 85721, USAM. R. BeckerKavli Institute for Particle Astrophysics & Cosmology, P.O. Box 2450, Stanford University, Stanford, California 94305, USAA. Benoit-LévyDepartment of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, United KingdomB. A. BensonKavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USAG. M. BernsteinDepartment of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USAE. BertinCNRS, UMR 7095, Institut d'Astrophysique de Paris, F-75014 Paris, FranceJ. BlazekInstitute of Physics, Laboratory of Astrophysics, École Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, 1290 Versoix, SwitzerlandSarah BridleJodrell Bank Center for Astrophysics, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, United KingdomDavid BrooksDepartment of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, United KingdomDillon BroutDepartment of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USAE. Buckley‐GeerFermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510, USAD. L. BurkeSLAC National Accelerator Laboratory, Menlo Park, California 94025, USAMichael T. BushaKavli Institute for Particle Astrophysics & Cosmology, P.O. Box 2450, Stanford University, Stanford, California 94305, USAA. CamposLaboratório Interinstitucional de e-Astronomia—LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, Rio de Janeiro 20921-400, BrazilD. CapozziInstitute of Cosmology & Gravitation, University of Portsmouth, Portsmouth PO1 3FX, United KingdomA. Carnero RosellLaboratório Interinstitucional de e-Astronomia—LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, Rio de Janeiro 20921-400, BrazilM. Carrasco KindDepartment of Astronomy, University of Illinois, 1002 West Green Street, Urbana, Illinois 61801, USAJ. CarreteroCampus UAB, 08193 Bellaterra (Barcelona), SpainF. J. CastanderInstitute of Space Sciences, IEEC-CSIC, Campus UAB, Carrer de Can Magrans, s/n, 08193 Barcelona, SpainR. CawthonKavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USAC. ChangKavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USANianyi ChenKavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USAM. ChildressSchool of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, United KingdomA. ChoiCenter for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, Ohio 43210, USAChristopher J. ConseliceUniversity of Nottingham, School of Physics and Astronomy, Nottingham NG7 2RD, United KingdomRobert CrittendenInstitute of Cosmology & Gravitation, University of Portsmouth, Portsmouth PO1 3FX, United KingdomM. CrocceInstitute of Space Sciences, IEEC-CSIC, Campus UAB, Carrer de Can Magrans, s/n, 08193 Barcelona, SpainC. E. CunhaStanford UniversityC. B. D’AndreaDepartment of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USAL. N. da CostaLaboratório Interinstitucional de e-AstronomiaRitanjan DasDepartment of Physics, University of Michigan, Ann Arbor, Michigan 48109, USAT. M. DavisARC Centre of Excellence for All-sky Astrophysics (CAASTROC. DavisKavli Institute for Particle Astrophysics & Cosmology, P.O. Box 2450, Stanford University, Stanford, California 94305, USAJ. De VicenteCentro de Investigaciones Energticas, Medioambientales y Tecnolgicas (CIEMAT), Madrid, SpainD. L. DePoyWoods Mitchell Institute for Fundamental Physics and Astronomy, andJoseph DeRoseDepartment of Physics, Stanford University, 382 Via Pueblo Mall, Stanford, California 94305, USAS. DesaiDepartment of Physics, IIT Hyderabad, Kandi, Telangana 502285, IndiaH. T. DiehlFermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510, USAJ. P. DietrichExcellence Cluster Universe, Boltzmannstr. 2, 85748 Garching, GermanyScott DodelsonKavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USAP. DoelDepartment of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, United KingdomA. Drlica-WagnerFermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510, USAT. F. EiflerJet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USAA. ElliottDepartment of Physics, The Ohio State University, Columbus, Ohio 43210, USAF. ElsnerDepartment of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, United KingdomJ. Elvin-PooleJodrell Bank Center for Astrophysics, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, United KingdomJ. EstradaFermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510, USAA. E. EvrardDepartment of Astronomy, University of Michigan, Ann Arbor, Michigan 48109, USAY. FangDepartment of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USAE. FernándezInstitut de Fsica d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology,A. FertéUniversity of EdinburghD. A. FinleyFermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510, USAB. FlaugherFermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510, USAP. FosalbaInstitute of Space Sciences, IEEC-CSIC, Campus UAB, Carrer de Can Magrans, s/n, 08193 Barcelona, SpainO. FriedrichMax Planck Institute for Extraterrestrial Physics, Giessenbachstrasse, 85748 Garching, GermanyJ. García-BellidoInstituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid, 28049 Madrid, SpainM. Garcia-FernandezCentro de Investigaciones Energticas, Medioambientales y Tecnolgicas (CIEMAT), Madrid, SpainM. GattiInstitut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, 08193 Bellaterra (Barcelona), SpainE. GaztañagaInstitute of Space Sciences, IEEC-CSIC, Campus UAB, Carrer de Can Magrans, s/n, 08193 Barcelona, SpainD. W. GerdesDepartment of Physics, University of Michigan, Ann Arbor, Michigan 48109, USAT. GiannantonioKavli Institute for Cosmology, University of Cambridge, Madingley Road, Cambridge CB3 0HA, United KingdomM. S. S. GillSLAC National Accelerator Laboratory, Menlo Park, California 94025, USAKarl GlazebrookCentre for Astrophysics & Supercomputing, Swinburne University of Technology, Victoria 3122, AustraliaD. A. GoldsteinLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, USAD. GruenEinstein Fellow 51 Astronomy Department, University of Washington, Box 351580, Seattle, Washington 98195, USAR. A. GruendlNational Center for Supercomputing Applications, 1205 West Clark Street, Urbana, Illinois 61801, USAJ. GschwendLaboratório Interinstitucional de e-Astronomia—LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, Rio de Janeiro 20921-400, BrazilG. GutiérrezFermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510, USAS. HamiltonDepartment of Physics, University of Michigan, Ann Arbor, Michigan 48109, USAW. G. HartleyDepartment of Physics, ETH Zurich, Wolfgang-Pauli-Strasse 16, CH-8093 Zurich, SwitzerlandS. R. HintonSchool of Mathematics and Physics, University of Queensland, Brisbane QLD 4072, AustraliaK. HonscheidCenter for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, Ohio 43210, USAB. HoyleUniversitäts-Sternwarte, Fakultät für Physik, Ludwig-Maximilians Universität München, Scheinerstr. 1, 81679 München, GermanyDragan HutererDepartment of Physics, University of Michigan, Ann Arbor, Michigan 48109, USABhuvnesh JainDepartment of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USAD. J. JamesAstronomy Department, University of Washington, Box 351580, Seattle, Washington 98195, USAMike JarvisDepartment of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USAT. JeltemaM. D. JohnsonNational Center for Supercomputing Applications, 1205 West Clark Street, Urbana, Illinois 61801, USAM. W. G. JohnsonNational Center for Supercomputing Applications, 1205 West Clark Street, Urbana, Illinois 61801, USATomasz KacprzakDepartment of Physics, ETH Zurich, Wolfgang-Pauli-Strasse 16, CH-8093 Zurich, SwitzerlandS. KentKavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
2018en
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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 CDM and wCDM cosmologies, marginalizing over 20 nuisance parameters, varying 6 (for CDM) or 7 (for wCDM) cosmological parameters including the neutrino mass density and including the 457 457 element analytic covariance matrix. We find consistent cosmological results from these three two-point functions and from their combination obtain S 8 8 m =0.3 0.5 0.773 0.026 -0.020 and m 0.267 0.030 -0.017 for CDM; for wCDM, we find S 8 0.782 0.036 -0.024 , m 0.284 0.033 -0.030 , and w -0.82 0.21 -0.20 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
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