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Interferometric 890 μm Images of High-Redshift Submillimeter Galaxies

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Published 2006 March 1 • © 2006. The American Astronomical Society. All rights reserved. Printed in U.S.A.
, , Citation D. Iono et al 2006 ApJ 640 L1 DOI 10.1086/503290

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Author affiliations

1 Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138

2 National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, 181-8588 Tokyo, Japan

3 Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Canada

4 California Institute of Technology, Pasadena, CA 91125

5 Department of Astronomy, University of Massachusetts, Amherst, MA 01003

6 Academia Sinica Institute of Astronomy and Astrophysics, P.O. Box 23-141, Taipei 106, Taiwan

7 Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK

8 Steward Observatory, 933 North Cherry Avenue, Tucson, AZ 85721

Dates

  1. Received 2005 August 19
  2. Accepted 2006 February 9
  3. Published
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1538-4357/640/1/L1

Abstract

We present high-resolution 890 μm images of two 20 mJy submillimeter galaxies, SMM J123711+622212 and MIPS J142824.0+352619, obtained using the Submillimeter Array (SMA). Using submillimeter interferometric observations with an angular resolution of 2farcs5, the coordinates of these high-redshift sources are determined with an accuracy of 0farcs2. The new SMA data on SMM J123711+622212 reveal an unresolved submillimeter source offset to the east by 0farcs8 from an optical galaxy found in deep HST images, suggesting either a large galaxy with a dusty central region or an interacting galaxy system. The SMA image of hyperluminous (LFIR = 3.2 × 1013 L☉) source MIPS J142824.0+352619 provides a firm upper limit to the source size of ≲1farcs2. This constraint provides evidence that the foreground lens is only weakly affecting the observed high far-infrared luminosity.

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10.1086/503290