Interferometric 890 μm Images of High-Redshift Submillimeter Galaxies

We present high resolution 890 micron images of two 20 mJy submillimetergalaxies, SMMJ123711+622212 and MIPS~J142824.0+352619, obtained using theSubmillimeter Array (SMA). Using submillimeter interferometric observationswith an angular resolution of 2.5", the coordinates of these high redshiftsources are determined with an accuracy of 0.2". The new SMA data onSMMJ123711+622212 reveal an unresolved submm source offset to the east by 0.8"from an optical galaxy found in deep HST images, suggesting either a largegalaxy with a dusty central region, or an interacting galaxy system. The SMAimage of hyper-luminous (LFIR = 3.2 x 10^{13} Lsun) sourceMIPS~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 weaklyaffecting the observed high FIR luminosity.Comment: 11 pages, 2 figures, ApJL accepte