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Title: DETECTION OF AN ULTRA-BRIGHT SUBMILLIMETER GALAXY BEHIND THE SMALL MAGELLANIC CLOUD

We report the discovery of a new ultra-bright submillimeter galaxy (SMG) behind the Small Magellanic Cloud (SMC). This SMG is detected as a 43.3 {+-} 8.4 mJy point source (MM J01071-7302, hereafter MMJ0107) in the 1.1 mm continuum survey of the SMC by AzTEC on the ASTE telescope. MMJ0107 is also detected in the radio (843 MHz), Herschel/SPIRE, Spitzer MIPS 24 {mu}m, all IRAC bands, Wide-field Infrared Survey Explorer, and near-infrared (J, H, K{sub S} ). We find an optical (U, B, V) source, which might be the lensing object, at a distance of 1.''4 from near-infrared and IRAC sources. Photometric redshift estimates for the SMG using representative spectral energy distribution templates show the redshifts of 1.4-3.9. We estimate total far-infrared luminosity of (0.3-2.2) Multiplication-Sign 10{sup 14} {mu}{sup -1} L{sub Sun} and a star formation rate of 5600-39, 000 {mu}{sup -1} M{sub Sun} yr{sup -1}, where {mu} is the gravitational magnification factor. This apparent extreme star formation activity is likely explained by a highly magnified gravitational lens system.
Authors:
; ; ;  [1] ; ;  [2] ;  [3] ; ; ; ; ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ;  [10] ;  [11] ;  [12] more »; « less
  1. Department of Cosmosciences, Graduate School of Science, Hokkaido University, Sapporo 060-0810 (Japan)
  2. Institute of Astronomy, University of Tokyo, Osawa, Mitaka, Tokyo 181-0015 (Japan)
  3. Department of Physics, Faculty of Science, Hokkaido University, Sapporo 060-0810 (Japan)
  4. Chile Observatory, National Astronomical Observatory, Mitaka, Tokyo 181-8588 (Japan)
  5. Nobeyama Radio Observatory, National Astronomical Observatory of Japan, Minamimaki, Minamisaku, Nagano 384-1305 (Japan)
  6. North American ALMA Science Center, National Radio Astronomy Observatory, Charlottesville, VA 22903 (United States)
  7. Center for Astrophysics and Space Astronomy, University of Colorado, Boulder, CO 80309 (United States)
  8. Joetsu University of Education, Joetsu, Niigata 943-8512 (Japan)
  9. Department of Physical Science, Osaka Prefecture University, Gakuen 1-1, Sakai, 599-8531 Osaka (Japan)
  10. Department of Astrophysics, Nagoya University, Chikusa-ku, Nagoya 464-8602 (Japan)
  11. Advanced Technology Center, National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588 (Japan)
  12. Instituto Nacional de Astrofisica, Optica y Electronica (INAOE), 72000 Puebla (Mexico)
Publication Date:
OSTI Identifier:
22136514
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 774; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; DISTANCE; ENERGY SPECTRA; GRAVITATIONAL LENSES; INFRARED SURVEYS; LUMINOSITY; MAGELLANIC CLOUDS; MHZ RANGE; POINT SOURCES; RED SHIFT; TELESCOPES