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A Comprehensive View of a Strongly Lensed Planck-Associated Submillimeter Galaxy

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  • Hai Fu
  • E. Jullo
  • A. Cooray
  • R. S. Bussmann
  • R. J. Ivison
  • I. Pérez-Fournon
  • S. G. Djorgovski
  • N. Scoville
  • L. Yan
  • D. A. Riechers
  • J. Aguirre
  • R. Auld
  • M. Baes
  • A. J. Baker
  • M. Bradford
  • A. Cava
  • D. L. Clements
  • H. Dannerbauer
  • A. Dariush
  • G. De Zotti
  • H. Dole
  • L. Dunne
  • S. Dye
  • S. Eales
  • D. Frayer
  • R. Gavazzi
  • M. Gurwell
  • A. I. Harris
  • D. Herranz
  • R. Hopwood
  • C. Hoyos
  • E. Ibar
  • M. J. Jarvis
  • S. Kim
  • L. Leeuw
  • R. Lupu
  • S. Maddox
  • P. Martínez-Navajas
  • M. J. Michałowski
  • M. Negrello
  • A. Omont
  • M. Rosenman
  • D. Scott
  • S. Serjeant
  • I. Smail
  • A. M. Swinbank
  • E. Valiante
  • A. Verma
  • J. Vieira
  • P. van der Werf
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<mark>Journal publication date</mark>1/07/2012
<mark>Journal</mark>The Astrophysical Journal
Issue number2
Volume753
Pages (from-to)134
Publication StatusPublished
<mark>Original language</mark>English

Abstract

We present high-resolution maps of stars, dust, and molecular gas in a strongly lensed submillimeter galaxy (SMG) at z = 3.259. HATLAS J114637.9-001132 is selected from the Herschel-Astrophysical Terahertz Large Area Survey (H-ATLAS) as a strong lens candidate mainly based on its unusually high 500 μm flux density (~300 mJy). It is the only high-redshift Planck detection in the 130 deg2 H-ATLAS Phase-I area. Keck Adaptive Optics images reveal a quadruply imaged galaxy in the K band while the Submillimeter Array and the Jansky Very Large Array show doubly imaged 880 μm and CO(1→0) sources, indicating differentiated distributions of the various components in the galaxy. In the source plane, the stars reside in three major kpc-scale clumps extended over ~1.6 kpc, the dust in a compact (~1 kpc) region ~3 kpc north of the stars, and the cold molecular gas in an extended (~7 kpc) disk ~5 kpc northeast of the stars. The emissions from the stars, dust, and gas are magnified by ~17, ~8, and ~7 times, respectively, by four lensing galaxies at z ~ 1. Intrinsically, the lensed galaxy is a warm (T dust ~ 40-65 K), hyper-luminous (L IR ~ 1.7 × 1013 L ⊙ star formation rate (SFR) ~2000 M ⊙ yr-1), gas-rich (M gas/M baryon ~ 70%), young (M stellar/SFR ~ 20 Myr), and short-lived (M gas/SFR ~ 40 Myr) starburst. With physical properties similar to unlensed z > 2 SMGs, HATLAS J114637.9-001132 offers a detailed view of a typical SMG through a powerful cosmic microscope.