Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-10-27
Astron.J.131:1216-1230,2006
Astronomy and Astrophysics
Astrophysics
33 pages, 1 figure + 4 pages of postage stamps. AJ, in press (February 2006 issue). Version with full-resolution figures is av
Scientific paper
10.1086/498823
We present optical and X-ray identifications for the sixty-four radio sources in the GOODS-S ACS field revealed in the ATCA 1.4 GHz survey of the Chandra Deep Field South. Optical identifications are made using the ACS images and catalogs, while the X-ray view is provided by the Chandra X-ray Observatory 1 Ms observations. Redshifts for the identified sources are drawn from publicly available catalogs of spectroscopic observations and multi-band photometric-based estimates. Using this multiwavelength information we provide a first characterization of the faint radio source population in this region. The sample contains a mixture of star-forming galaxies and active galactic nuclei, as identified by their X-ray properties and optical spectroscopy. A large number of morphologically disturbed galaxies is found, possibly related to the star-formation phenomena. In spite of the very deep optical data available in this field, seven of the sixty-four radio sources have no optical identification to z(850)~28 mag. Only one of these is identified in the X-rays.
Afonso Jose
Cram Lawrence
Koekemoer Anton
Mobasher Bahram
Norris Ray P.
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