Journal
ASTRONOMICAL JOURNAL
Volume 120, Issue 4, Pages 1668-1674Publisher
IOP PUBLISHING LTD
DOI: 10.1086/301571
Keywords
galaxies : evolution; galaxies : formation; galaxies : individual (SMM J00266+1708); galaxies : starburst
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We report the detection of 1.3 mm continuum and near-infrared K-band (2.2 mu m) emission from the submillimeter galaxy SMM J00266 + 1708. Although this galaxy is among the brightest submillimeter sources detected in the blank-sky surveys (L similar to 10(13) L.), SMM J00266 + 1708 had no reliable optical or near-infrared counterpart. We used sensitive interferometric 1.3 mm observations with the Owens Valley Millimeter Array to determine the position of the submillimeter galaxy accurately. Follow-up near-infrared imaging with the Reck I telescope uncovered a new faint red galaxy at K = 22.5 mag, which is spatially coincident with the 1.3 mm emission. This is currently the faintest confirmed counterpart of a submillimeter galaxy. Although the redshift of SMM. J00266+1708 is still unknown, its high submillimeter/radio spectral index suggests that the system is at high redshift (z greater than or similar to 2). Approximately 50% or more of the submillimeter galaxies are faint red galaxies similar to SMM J00266 + 1708. These ultraluminous obscured galaxies account for a significant fraction of the total amount of star formation at high redshift despite being missed by optical surveys.
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