Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21910906k&link_type=abstract
American Astronomical Society, AAS Meeting #219, #109.06
Astronomy and Astrophysics
Astronomy
Scientific paper
Using radio, x-ray, optical, FIR and NIR observations we have classified the radio emission from QSOs and galaxies found in 1.4 GHz VLA observations of the Chandra Deep Field South. We use the radio and optical morphology, optical spectroscopy, and IR colors, as well as comparing radio, x-ray, and optical luminosity to separate AGN and star formation driven radio emission from galaxies and QSOs (Padovani et al. 2011, ApJ, 740, 20). The sub-millijansky sky appears to contain a complex mix of star-forming galaxies, low luminosity AGN driven radio galaxies, as well as a previously unrecognized population of radio sources due to star formation from the hosts of radio-quiet QSOs which is also reported by Kimball et al. (2011, ApJL, 739, 29) from EVLA observations of quasars found in the SDSS. New observations by Miller et al. (2008, ApJS, 179, 114, and in preparation) made with a mosaic of six VLA pointings reach an rms sensitivity of 7 microJy over most of the CDFS. Combined with additional optical, IR and x-ray data, the new radio data will improve the determination of radio luminosity functions and their evolution which is made more complex by the emerging evidence that radio emission from both star formation and AGN coexist in both quasars and galaxies in varying amounts.
CDFS Group
EVLAQUASAR Group
Kellermann Kenneth I.
Kimball Amy
Miller Natalia
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