A comprehensive view of a strongly lensed planck-associated submillimeter galaxy

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 ZottiH. 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, J. L. Wardlow, P. Van Der Werf

Research output: Contribution to journalArticle

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 (300mJy). It is the only high-redshift Planck detection in the 130deg2 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 1.6kpc, the dust in a compact (∼1 kpc) region ∼3kpc north of the stars, and the cold molecular gas in an extended (∼7kpc) disk ∼5kpc northeast of the stars. The emissions from the stars, dust, and gas are magnified by ∼17, ∼8, and ∼7times, 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 20Myr), and short-lived (M gas/SFR 40Myr) 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.

Original languageEnglish (US)
Article number134
JournalAstrophysical Journal
Volume753
Issue number2
DOIs
StatePublished - Jul 10 2012

Keywords

  • galaxies: formation
  • galaxies: individual (HATLAS J114637.9-001132)
  • galaxies: interactions

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Fu, H., Jullo, E., Cooray, A., Bussmann, R. S., Ivison, R. J., Pérez-Fournon, I., Djorgovski, S. G., Scoville, N., Yan, L., Riechers, D. A., Aguirre, J., Auld, R., Baes, M., Baker, A. J., Bradford, M., Cava, A., Clements, D. L., Dannerbauer, H., Dariush, A., ... Van Der Werf, P. (2012). A comprehensive view of a strongly lensed planck-associated submillimeter galaxy. Astrophysical Journal, 753(2), [134]. https://doi.org/10.1088/0004-637X/753/2/134