A Comprehensive View of a Strongly Lensedplanck-Associated Submillimeter Galaxy

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 deg 2 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 × 10 13 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.