INTERFEROMETRIC FOLLOW-UP OF WISE HYPER-LUMINOUS HOT, DUST-OBSCURED GALAXIES

The Wide-field. Infrared Survey Explorer (WISE) has discovered an extraordinary population of hyper-luminous dusty galaxies that are faint in the two bluer passbands (3.4 mu m and 4.6 mu m) but are bright in the two redder passbands of WISE (12 mu m and 22 mu m). We report on initial follow-up observations of three of these hot, dust-obscured galaxies, or Hot DOGs, using the Combined Array for Research in Millimeter-wave Astronomy and the Submillimeter Array interferometer arrays at submillimeter/millimeter wavelengths. We report continuum detections at ~1.3 mm of two sources (WISE J014946.17+235014.5 and WISE J223810.20+265319.7, hereafter WO 149+2350 and W2238+2653, respectively), and upper limits to CO line emission at 3 mm in the observed frame for two sources (W0149+2350 and WISE J181417.29+341224.8, hereafter W1814+3412). The 1.3 mm continuum images have a resolution of 1''-2'' and are consistent with single point sources. We estimate the masses of cold dust are 2.0 x 10 super(8) M sub([middot in circle]) for W0149+2350 and 3.9 x 10 super(8) M sub([middot in circle]) for W2238+2653, comparable to cold dust masses of luminous quasars. We obtain 2[sigma] upper limits to the molecular gas masses traced by CO, which are 3.3 x 10 super(10) M sub([middot in circle]) and 2.3 x 10 super(10) M sub([middot in circle]) for W0149+2350 and W1814+3412, respectively. We also present high-resolution, near-IR imaging with the WFC3 on the Hubble Space Telescope for W0149+2653 and with NIRC2 on Keck for W2238+2653. The near-IR images show morphological structure dominated by a single, centrally condensed source with effective radius less than 4 kpc. No signs of gravitational lensing are evident.