[en] Galaxies and galaxy groups located along the line of sight towards gravitationally lensed quasars produce high-order perturbations of the gravitational potential at the lens position. When these perturbation are too large, they can induce a systematic error on H[SUB]0[/SUB] of a few per cent if the lens system is used for cosmological inference and the perturbers are not explicitly accounted for in the lens model. In this work, we present a detailed characterization of the environment of the lens system WFI 2033-4723 (z_src = 1.662, z_lens= 0.6575), one of the core targets of the H0LiCOW project for which we present cosmological inferences in a companion paper. We use the Gemini and ESO- Very Large telescopes to measure the spectroscopic redshifts of the brightest galaxies towards the lens, and use the ESO-MUSE integral field spectrograph to measure the velocity-dispersion of the lens (σ _{los}= 250^{+15}_{-21} km s[SUP]-1[/SUP]) and of several nearby galaxies. In addition, we measure photometric redshifts and stellar masses of all galaxies down to i < 23 mag, mainly based on Dark Energy Survey imaging (DR1). Our new catalogue, complemented with literature data, more than doubles the number of known galaxy spectroscopic redshifts in the direct vicinity of the lens, expanding to 116 (64) the number of spectroscopic redshifts for galaxies separated by less than 3 arcmin (2 arcmin ) from the lens. Using the flexion-shift as a measure of the amplitude of the gravitational perturbation, we identify two galaxy groups and three galaxies that require specific attention in the lens models. The ESO MUSE data enable us to measure the velocity-dispersions of three of these galaxies. These results are essential for the cosmological inference analysis presented in Rusu et al.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Sluse, Dominique ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa)
Rusu, C. E.; Subaru Telescope, National Astronomical Observatory of Japan, 650 N Aohoku Pl, Hilo, HI 96720, USA ; Department of Physics, University of California, Davis, CA 95616, USA
Fassnacht, C. D.; Department of Physics, University of California, Davis, CA 95616, USA
Sonnenfeld, A.; Kavli IPMU (WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan ; Leiden Observatory, Leiden University, Niels Bohrweg 2, NL-2333 CA Leiden, the Netherlands
Richard, J.; CRAL, Observatoire de Lyon, F-69230 Saint-Genis-Laval, France
Auger, M. W.; Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
Coccato, L.; European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching, Germany
Wong, K. C.; Kavli IPMU (WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan ; National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
Suyu, S. H.; Max Planck Institute for Astrophysics, Karl-Schwarzschild-Strasse 1, D-85741 Garching, Germany ; Institute of Astronomy and Astrophysics, Academia Sinica, PO Box 23-141, Taipei 10617, Taiwan ; Physik-Department, Technische Universität München, James-Franck-Strasse 1, D-85748 Garching, Germany
Treu, T.; Department of Physics and Astronomy, PAB, 430 Portola Plaza, Box 951547, Los Angeles, CA 90095, USA
Agnello, Adriano; European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching, Germany.
Birrer, S.; Department of Physics and Astronomy, PAB, 430 Portola Plaza, Box 951547, Los Angeles, CA 90095, USA
Bonvin, V.; Laboratoire d'Astrophysique, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, CH-1290 Versoix, Switzerland
Collett, T.; Institute of Cosmology and Gravitation, University of Portsmouth, Burnaby Rd, Portsmouth PO1 3FX, UK
Courbin, F.; Laboratoire d'Astrophysique, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, CH-1290 Versoix, Switzerland
Koopmans, L. V. E.; Kapteyn Astronomical Institute, University of Groningen, PO Box 800, NL-9700 AV Groningen, the Netherlands
Tihhanova, O.; Laboratoire d'Astrophysique, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, CH-1290 Versoix, Switzerland
Marshall, P. J.; Kavli Institute for Particle Astrophysics & Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USA
Meylan, G.; Laboratoire d'Astrophysique, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, CH-1290 Versoix, Switzerland
Shajib, A. J.; Department of Physics and Astronomy, PAB, 430 Portola Plaza, Box 951547, Los Angeles, CA 90095, USA
Annis, J.; Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USA
Avila, S.; Instituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid, E-28049 Madrid, Spain
Bertin, E.; CNRS, UMR 7095, Institut d'Astrophysique de Paris, F-75014 Paris, France ; Sorbonne Universités, UPMC Univ Paris 06, UMR 7095, Institut d'Astrophysique de Paris, F-75014 Paris, France
Brooks, D.; Department of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, UK
Buckley-Geer, E.; Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USA
Burke, D. L.; Kavli Institute for Particle Astrophysics & Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USA ; SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
Carnero Rosell, A.; Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain ; Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ 20921-400, Brazil
Carrasco Kind, M.; 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
Carretero, J.; Institut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra (Barcelona), Spain
Castander, F. J.; Institut d'Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, Spain ; Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n, E-08193 Barcelona, Spain
da Costa, L. N.; 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
De Vicente, J.; Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain
Desai, S.; Department of Physics, IIT Hyderabad, Kandi, Telangana 502285, India
Doel, P.; Department of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, UK
Evrard, A. E.; Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA ; Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA
Flaugher, B.; Department of Physics, ETH Zurich, Wolfgang-Pauli-Strasse 16, CH-8093 Zurich, Switzerland
Frieman, J.; Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USA ; Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
García-Bellido, J.; Instituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid, E-28049 Madrid, Spain
Gerdes, D. W.; Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA ; Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA
Goldstein, D. A.; California Institute of Technology, 1200 East California Blvd, MC 249-17, Pasadena, CA 91125, USA
Gruendl, R. A.; 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
Gschwend, J.; 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
Hartley, W. G.; 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
Hollowood, D. L.; Santa Cruz Institute for Particle Physics, Santa Cruz, CA 95064, USA
Honscheid, K.; 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
James, D. J.; Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA
Kim, A. G.; Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
Krause, E.; Department of Astronomy/Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA
Kuehn, K.; Australian Astronomical Optics, Macquarie University, North Ryde, NSW 2113, Australia
Kuropatkin, N.; Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USA
Lima, M.; Departamento de Física Matemática, Instituto de Física, Universidade de São Paulo, CP 66318, São Paulo, SP 05314-970, Brazil ; 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
Lin, H.; Department of Astrophysical Sciences, Princeton University, Peyton Hall, Princeton, NJ 08544, USA
Maia, M. A. G.; 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
Marshall, J. L.; 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
Melchior, P.; Department of Astrophysical Sciences, Princeton University, Peyton Hall, Princeton, NJ 08544, USA
Menanteau, F.; 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
Miquel, R.; Institut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra (Barcelona), Spain ; Institució Catalana de Recerca i Estudis Avançats, E-08010 Barcelona, Spain
Plazas, A. A.; Department of Astrophysical Sciences, Princeton University, Peyton Hall, Princeton, NJ 08544, USA
Sanchez, E.; Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain
Serrano, S.; Institut d'Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, Spain ; Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n, E-08193 Barcelona, Spain
Sevilla-Noarbe, I.; Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain
Smith, M.; School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, UK
Soares-Santos, M.; Brandeis University, Physics Department, 415 South Street, Waltham, MA 02453, USA
Sobreira, F.; Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ 20921-400, Brazil ; Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, 13083-859 Campinas, SP, Brazil
Suchyta, E.; Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
Swanson, M. E. C.; National Center for Supercomputing Applications, 1205 West Clark St., Urbana, IL 61801, USA
Tarle, G.; Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA)
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