Interferometric 890 µm Images of High-Redshift Submillimeter Galaxies
Le Floc'h, E.; Yun, M. S.; Scott, D.; Iono, D.; Pope, A.; Dunlop, J. S.; Wilner, D. J.; Elvis, M.; Gurwell, M.; Blain, A.; Borys, C.; Matsushita, S.; Peck, A. B.; Ho, P. T. P.; Petitpas, G. R.
United States, Japan, Canada, Taiwan, United Kingdom
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 2.5", the coordinates of these high-redshift sources are determined with an accuracy of 0.2". The new SMA data on SMM J123711+622212 reveal an unresolved submillimeter source offset to the east by 0.8" 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 Lsolar) source MIPS J142824.0+352619 provides a firm upper limit to the source size of <~1.2". This constraint provides evidence that the foreground lens is only weakly affecting the observed high far-infrared luminosity.