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Interferometric Follow-Up of WISE Hyper-Luminous Hot, Dust-Obscured Galaxies
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Interferometric Follow-Up of WISE Hyper-Luminous Hot, Dust-Obscured Galaxies
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Interferometric Follow-Up of WISE Hyper-Luminous Hot, Dust-Obscured Galaxies
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Paper
Interferometric Follow-Up of WISE Hyper-Luminous Hot, Dust-Obscured Galaxies
2014
Overview
WISE has discovered an extraordinary population of hyper-luminous dusty galaxies which 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 CARMA and SMA interferometer arrays at submm/mm wavelengths. We report continuum detections at \\(\\sim\\) 1.3 mm of two sources (WISE J014946.17+235014.5 and WISE J223810.20+265319.7, hereafter W0149+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 arcsec and are consistent with single point sources. We estimate the masses of cold dust are 2.0\\(\\times 10^{8} M_{\\odot}\\) for W0149+2350 and 3.9\\(\\times 10^{8} M_{\\odot}\\) 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\\(\\times 10^{10} M_{\\odot}\\) and 2.3\\(\\times 10^{10} M_{\\odot}\\) for W0149+2350 and W1814+3412, respectively. We also present high-resolution, near-IR imaging with 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.
Publisher
Cornell University Library, arXiv.org
