A Comprehensive View of a Strongly Lensed Planck-Associated Submillimeter Galaxy
Abstract
We present high-resolution maps of stars, dust, and molecular gas in a strongly lensed submillimeter galaxy (SMG) at z = 3.259. HATLAS12--00 is selected from the Herschel-Astrophysical Terahertz Large Area Survey (H-ATLAS) as a strong lens candidate mainly based on its unusually high 500um flux density (~300 mJy). It is the only high-redshift Planck detection in the 130 deg^2 H-ATLAS Phase 1 area. Keck Adaptive Optics images reveal a quadruply imaged galaxy in the K-band while the Submillimeter Array and the Extended Very Large Array show doubly imaged 880um 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 emission 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 ~ 1.7e13 Lsun; SFR ~ 2000 Msun/yr), gas-rich (M_gas/M_baryon ~ 70%), young (M_stellar/SFR ~ 20 Myr), and short-lived (M_gas/SFR ~ 40 Myr) starburst, without a significant active galactic nucleus. With physical properties similar to unlensed z > 2 SMGs, HATLAS12--00 offers a detailed view of a typical SMG through a powerful cosmic microscope.
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Cite
@article{arxiv.1202.1829,
title = {A Comprehensive View of a Strongly Lensed Planck-Associated Submillimeter Galaxy},
author = {Hai Fu and E. Jullo and A. Cooray and R. S. Bussmann and R. J. Ivison and I. Perez-Fournon and S. G. Djorgovski and N. Scoville and L. Yan and D. A. Riechers and J. Aguirre and R. Auld and M. Baes and A. J. Baker and M. Bradford and A. Cava and D. L. Clements and H. Dannerbauer and A. Dariush and G. De Zotti and H. Dole and L. Dunne and S. Dye and S. Eales and D. Frayer and R. Gavazzi and M. Gurwell and A. I. Harris and D. Herranz and R. Hopwood and C. Hoyos and E. Ibar and M. J. Jarvis and S. Kim and L. Leeuw and R. Lupu and S. Maddox and P. Martinez-Navajas and M. J. Michalowski and M. Negrello and A. Omont and M. Rosenman and D. Scott and S. Serjeant and I. Smail and A. M. Swinbank and E. Valiante and A. Verma and J. Vieira and J. L. Wardlow and P. van der Werf},
journal= {arXiv preprint arXiv:1202.1829},
year = {2015}
}
Comments
ApJ accepted version. Minor revisions. 12 pages, 4 figures, emulateapj style