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Hubble Frontier Fields: a high-precision strong-lensing analysis of galaxy cluster MACSJ0416.1-2403 using∼200 multiple images

Jauzac, M. ; Clément, B. ; Limousin, M. ; Richard, J. ; Jullo, E. ; Ebeling, H. ; Atek, H. ; Kneib, J.-P ; Knowles, K. ; Natarajan, P. ; Eckert, D. ; Egami, E. ; Massey, R. ; Rexroth, M.

In: Monthly Notices of the Royal Astronomical Society, 2014, vol. 443, no. 2, p. 1549-1554

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    Title
    • Hubble Frontier Fields: a high-precision strong-lensing analysis of galaxy cluster MACSJ0416.1-2403 using∼200 multiple images
    Author
    • Jauzac, M.. Institute for Computational Cosmology, Durham University, South Road, Durham DH1 3LE, UK
    • Clément, B.. Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA
    • Limousin, M.. Laboratoire d'Astrophysique de Marseille - LAM, Université d'Aix-Marseille & CNRS, UMR7326, 38 rue F. Joliot-Curie, 13388 Marseille Cedex 13, France
    • Richard, J.. CRAL, Observatoire de Lyon, Université Lyon 1, 9 Avenue Ch. André, 69561 Saint Genis Laval Cedex, France
    • Jullo, E.. Laboratoire d'Astrophysique de Marseille - LAM, Université d'Aix-Marseille & CNRS, UMR7326, 38 rue F. Joliot-Curie, 13388 Marseille Cedex 13, France
    • Ebeling, H.. Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA
    • Atek, H.. Laboratoire d'Astrophysique, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, CH-1290 Versoix, Switzerland
    • Kneib, J.-P. Laboratoire d'Astrophysique de Marseille - LAM, Université d'Aix-Marseille & CNRS, UMR7326, 38 rue F. Joliot-Curie, 13388 Marseille Cedex 13, France
    • Knowles, K.. Astrophysics and Cosmology Research Unit, School of Mathematical Sciences, University of KwaZulu-Natal, Durban 4041, South Africa
    • Natarajan, P.. Department of Astronomy, Yale University, 260 Whitney Avenue, New Haven, CT 06511, USA
    • Eckert, D.. Astronomy Department, University of Geneva, 16 ch. d'Ecogia, CH-1290 Versoix, Switzerland
    • Egami, E.. Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA
    • Massey, R.. Institute for Computational Cosmology, Durham University, South Road, Durham DH1 3LE, UK
    • Rexroth, M.. Laboratoire d'Astrophysique, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, CH-1290 Versoix, Switzerland
    Document Type
    • Postprint
    Language
    • English
    Published in
    • Monthly Notices of the Royal Astronomical Society, 2014, vol. 443, no. 2, p. 1549-1554. Oxford University Press
    Other Version
    OAI-PMH Identifier
    • oai:doc.rero.ch:293793
    Summary
    We present a high-precision mass model of the galaxy cluster MACSJ0416.1-2403, based on a strong-gravitational-lensing analysis of the recently acquired Hubble Space Telescope Frontier Fields (HFF) imaging data. Taking advantage of the unprecedented depth provided by HST/Advanced Camera for Survey observations in three passbands, we identify 51 new multiply imaged galaxies, quadrupling the previous census and bringing the grand total to 68, comprising 194 individual lensed images. Having selected a subset of the 57 most securely identified multiply imaged galaxies, we use the lenstool software package to constrain a lens model comprised of two cluster-scale dark-matter haloes and 98 galaxy-scale haloes. Our best-fitting model predicts image positions with an rms error of 0.68arcsec, which constitutes an improvement of almost a factor of 2 over previous, pre-HFF models of this cluster. We find the total projected mass inside a 200kpc aperture to be (1.60±0.01)×1014 M⊙, a measurement that offers a three-fold improvement in precision, reaching the per cent level for the first time in any cluster. Finally, we quantify the increase in precision of the derived gravitational magnification of high-redshift galaxies and find an improvement by a factor of∼2.5 in the statistical uncertainty. Our findings impressively confirm that HFF imaging has indeed opened the domain of high-precision mass measurements for massive clusters of galaxies