Dark Energy Survey Year 1 results: constraints on intrinsic alignments and their colour dependence from galaxy clustering and weak lensing
S. SamuroffMcWilliams Center for Cosmology, Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USAJ. BlazekCenter for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USAM. A. TroxelCenter for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USAN. MacCrannCenter for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USAE. KrauseC. Danielle LeonardMcWilliams Center for Cosmology, Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USAJ. PratInstitut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra (Barcelona), SpainD. GruenKavli Institute for Particle Astrophysics & Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USAScott DodelsonMcWilliams Center for Cosmology, Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USAT. F. EiflerDepartment of Astronomy/Steward Observatory, 933 North Cherry Avenue, Tucson, AZ 85721-0065, USAM. GattiInstitut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra (Barcelona), SpainW G HartleyDepartment of Physics, ETH Zurich, Wolfgang-Pauli-Strasse 16, CH-8093 Zurich, SwitzerlandB. HoyleMax Planck Institute for Extraterrestrial Physics, Giessenbachstrasse, D-85748 Garching, GermanyPatricia LarsenArgonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439, USAJ. ZuntzScottish Universities Physics Alliance, Institute for Astronomy, University of Edinburgh, Edinburgh EH9 3HJ, UKT. M. C. AbbottCerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, Casilla 603, La Serena, ChileS. AllamFermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USAJ. AnnisFermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USAG. M. BernsteinDepartment of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USAE. BertinCNRS, UMR 7095, Institut d’Astrophysique de Paris, F-75014 Paris, FranceS. L. BridleJodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UKDavid BrooksDepartment of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, UKA. Carnero RosellCentro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, SpainM. Carrasco KindDepartment of Astronomy, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, IL 61801, USAJ. CarreteroInstitut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra (Barcelona), SpainF. J. CastanderInstitut d’Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, SpainC. E. CunhaKavli Institute for Particle Astrophysics & Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USAL. N. da CostaLaboratório Interinstitucional de e-Astronomia – LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ 20921-400, BrazilC. DavisKavli Institute for Particle Astrophysics & Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USAJ. De VicenteCentro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, SpainD. L. DePoyGeorge 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, USAS. DesaiDepartment of Physics, IIT Hyderabad, Kandi, Telangana 502285, IndiaH. T. DiehlDepartment of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USAJ. P. DietrichExcellence Cluster Universe, Boltzmannstr 2, D-85748 Garching, GermanyP. DoelDepartment of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, UKB. FlaugherFermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USAP. FosalbaInstitut d’Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, SpainJ. FriemanFermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USAJ. García-BellidoInstituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid, E-28049 Madrid, SpainE. GaztañagaInstitut d’Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, SpainD. W. GerdesDepartment of Astronomy, University of Michigan, Ann Arbor, MI 48109, USAR. A. GruendlDepartment of Astronomy, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, IL 61801, USAJ. GschwendLaboratório Interinstitucional de e-Astronomia – LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ 20921-400, BrazilG. GutiérrezFermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USAD L HollowoodK. HonscheidCenter for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USAD. J. JamesHarvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USAK. KuehnAustralian Astronomical Optics, Macquarie University, North Ryde, NSW 2113, AustraliaN. KuropatkinFermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USAM. LimaDepartamento de Física Matemática, Instituto de Física, Universidade de São Paulo, CP 66318, São Paulo, SP 05314-970, BrazilM. A. G. MaiaLaboratório Interinstitucional de e-Astronomia – LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ 20921-400, BrazilM. MarchCNRS, UMR 7095, Institut d’Astrophysique de Paris, F-75014 Paris, FranceJ. L. MarshallGeorge 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, USAPaul MartiniCenter for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USAP. MelchiorDepartment of Astrophysical Sciences, Princeton University, Peyton Hall, Princeton, NJ 08544, USAF. MenanteauDepartment of Astronomy, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, IL 61801, USAC. J. MillerDepartment of Astronomy, University of Michigan, Ann Arbor, MI 48109, USAR. MiquelInstitució Catalana de Recerca i Estudis Avançats, E-08010 Barcelona, SpainR. L. C. OgandoLaboratório Interinstitucional de e-Astronomia – LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ 20921-400, BrazilA A PlazasDepartment of Astrophysical Sciences, Princeton University, Peyton Hall, Princeton, NJ 08544, USAE. SánchezCentro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, SpainV. ScarpineFermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USAR. SchindlerSLAC National Accelerator Laboratory, Menlo Park, CA 94025, USAM. SchubnellDepartment of Physics, University of Michigan, Ann Arbor, MI 48109, USAS. SerranoInstitut d’Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, SpainI. Sevilla-NoarbeCentro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, SpainE. SheldonBrookhaven National Laboratory, Bldg 510, Upton, NY 11973, USAM. SmithSchool of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, UKF. SobreiraInstituto de Física Gleb Wataghin, Universidade Estadual de Campinas, 13083-859 Campinas, SP, BrazilE. SuchytaComputer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USAG. TarléDepartment of Physics, University of Michigan, Ann Arbor, MI 48109, USAD. ThomasInstitute of Cosmology and Gravitation, University of Portsmouth, Portsmouth PO1 3FX, UKV. VikramArgonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439, USA
2019en
ABI
Аннотация
Abstract We perform a joint analysis of intrinsic alignments and cosmology using tomographic weak lensing, galaxy clustering, and galaxy–galaxy lensing measurements from Year 1 (Y1) of the Dark Energy Survey. We define early- and late-type subsamples, which are found to pass a series of systematics tests, including for spurious photometric redshift error and point spread function correlations. We analyse these split data alongside the fiducial mixed Y1 sample using a range of intrinsic alignment models. In a fiducial non-linear alignment model analysis, assuming a flat Λ cold dark matter cosmology, we find a significant difference in intrinsic alignment amplitude, with early-type galaxies favouring $A_\mathrm{IA} = 2.38^{+0.32}_{-0.31}$ and late-type galaxies consistent with no intrinsic alignments at $0.05^{+0.10}_{-0.09}$. The analysis is repeated using a number of extended model spaces, including a physically motivated model that includes both tidal torquing and tidal alignment mechanisms. In multiprobe likelihood chains in which cosmology, intrinsic alignments in both galaxy samples and all other relevant systematics are varied simultaneously, we find the tidal alignment and tidal torquing parts of the intrinsic alignment signal have amplitudes $A_1 = 2.66 ^{+0.67}_{-0.66}$, $A_2=-2.94^{+1.94}_{-1.83}$, respectively, for early-type galaxies and $A_1 = 0.62 ^{+0.41}_{-0.41}$, $A_2 = -2.26^{+1.30}_{-1.16}$ for late-type galaxies. In the full (mixed) Y1 sample the best constraints are $A_1 = 0.70 ^{+0.41}_{-0.38}$, $A_2 = -1.36 ^{+1.08}_{-1.41}$. For all galaxy splits and IA models considered, we report cosmological parameter constraints consistent with the results of the main DES Y1 cosmic shear and multiprobe cosmology papers.
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