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

Fu, Hai and Jullo, E. and Cooray, A. and Bussmann, R. S. and Ivison, R. J. and Pérez-Fournon, I. and Djorgovski, S. G. and Scoville, N. and Yan, L. and Riechers, D. A. and Aguirre, J. and Auld, R. and Baes, M. and Baker, A. J. and Bradford, M. and Cava, A. and Clements, D. L. and Dannerbauer, H. and Dariush, A. and De Zotti, G. and Dole, H. and Dunne, L. and Dye, S. and Eales, S. and Frayer, D. and Gavazzi, R. and Gurwell, M. and Harris, A. I. and Herranz, D. and Hopwood, R. and Hoyos, C. and Ibar, E. and Jarvis, M. J. and Kim, S. and Leeuw, L. and Lupu, R. and Maddox, S. and Martínez-Navajas, P. and Michałowski, M. J. and Negrello, M. and Omont, A. and Rosenman, M. and Scott, D. and Serjeant, S. and Smail, I. and Swinbank, A. M. and Valiante, E. and Verma, A. and Vieira, J. and Wardlow, J. L. and van der Werf, P. (2012) A Comprehensive View of a Strongly Lensed Planck-Associated Submillimeter Galaxy. The Astrophysical Journal, 753 (2). p. 134. ISSN 0004-637X

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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.

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Journal Article
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The Astrophysical Journal
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22 Oct 2018 08:24
Last Modified:
21 Sep 2023 02:29