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Phys Rev Lett. 2015 Jul 31;115(5):051301. Epub 2015 Jul 29.

Wide-Field Lensing Mass Maps from Dark Energy Survey Science Verification Data.

Author information

1
Department of Physics, ETH Zurich, Wolfgang-Pauli-Strasse 16, CH-8093 Zurich, Switzerland.
2
Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439, USA.
3
Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
4
Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth PO1 3FX, United Kingdom.
5
Department of Physics, Stanford University, 382 Via Pueblo Mall, Stanford, California 94305, USA.
6
Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, P. O. Box 2450, Stanford, California 94305, USA.
7
Institut de Física d'Altes Energies, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Barcelona, Spain.
8
Jodrell Bank Center for Astrophysics, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom.
9
Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA.
10
Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, Illinois 60510, USA.
11
Institut de Ciències de l'Espai, IEEC-CSIC, Campus UAB, Facultat de Ciències, Torre C5 par-2, 08193 Bellaterra, Barcelona, Spain.
12
Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.
13
Center for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, Ohio 43210, USA.
14
Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA.
15
Department of Physics, University of Arizona, 1118 East Fourth Street, Tucson, Arizona 85721, USA.
16
SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
17
Brookhaven National Laboratory, Building 510, Upton, New York 11973, USA.
18
Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, Casilla 603, La Serena, Chile.
19
Laboratório Interinstitucional de e-Astronomia-LIneA, Rua General Jos´e Cristino 77, Rio de Janeiro, RJ 20921-400, Brazil.
20
Observatório Nacional, Rua General Jos´e Cristino 77, Rio de Janeiro, RJ 20921-400, Brazil.
21
Department of Physics, University of Illinois, 1110 West Green Street, Urbana, Illinois 61801, USA.
22
National Center for Supercomputing Applications, 1205 West Clark Street, Urbana, Illinois 61801, USA.
23
Department of Physics, Ludwig-Maximilians-Universitaet, Scheinerstrasse 1, 81679 Munich, Germany.
24
Excellence Cluster Universe, Boltzmannstrasse 2, 85748 Garching, Germany.
25
Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USA.
26
Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
27
Max Planck Institute for Extraterrestrial Physics, Giessenbachstrasse, 85748 Garching, Germany.
28
University Observatory Munich, Scheinerstrasse 1, 81679 Munich, Germany.
29
Australian Astronomical Observatory, North Ryde, New South Wales 2113, Australia.
30
Department of Astronomy, University of Michigan, Ann Arbor, Michigan 48109, USA.
31
Institució Catalana de Recerca i Estudis Avançats, E-08010 Barcelona, Spain.
32
Department of Physics and Astronomy, Pevensey Building, University of Sussex, Brighton BN1 9QH, United Kingdom.
33
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid 28040, Spain.
34
SEPnet, South East Physics Network, Southampton SO17 1BJ, United Kingdom.

Abstract

We present a mass map reconstructed from weak gravitational lensing shear measurements over 139  deg2 from the Dark Energy Survey science verification data. The mass map probes both luminous and dark matter, thus providing a tool for studying cosmology. We find good agreement between the mass map and the distribution of massive galaxy clusters identified using a red-sequence cluster finder. Potential candidates for superclusters and voids are identified using these maps. We measure the cross-correlation between the mass map and a magnitude-limited foreground galaxy sample and find a detection at the 6.8σ level with 20 arc min smoothing. These measurements are consistent with simulated galaxy catalogs based on N-body simulations from a cold dark matter model with a cosmological constant. This suggests low systematics uncertainties in the map. We summarize our key findings in this Letter; the detailed methodology and tests for systematics are presented in a companion paper.

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