Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-07-07
Astronomy and Astrophysics
Astrophysics
In press at ApJ, 4 pages, LaTeX, 2 figures, uses emulateapj.sty
Scientific paper
10.1086/308226
We present deep radio maps from the Very Large Array (VLA) for 16 sources detected in a sub-millimeter (submm) survey of the distant Universe. Our deep VLA 1.4-GHz maps allow us to identify radio counterparts or place stringent limits (<20uJy in the source plane) on the radio flux of the submm sources. We compare the spectral indices of our sources between 850um and 1.4GHz to empirical and theoretical models for distant starburst galaxies and active galactic nuclei (AGN) as a function of redshift. In this way we can derive redshift limits for the submm sources, even in the absence of an optical or near-infrared counterpart. We conclude that the submm population brighter than \~1mJy has a median redshift of at least
Blain Andrew W.
Ivison Rob J.
Kneib Jean Paul
Owen Frazer N.
Smail Ian
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