Other
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20922506s&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #225.06; Bulletin of the American Astronomical Society,
Other
Scientific paper
The true nature of the faint radio population remains elusive despite the many observations of the ``sub-mJy'' bump over the last two decades. This lack of information is largely due to the faint magnitudes of the optical counterparts to the radio sources. There are strong theoretical reasons (and a few observational ones) to believe that this rise in the counts is due to the emergence of a rapidly evolving star-forming population. Now, for the first time, we are able to separate the AGN and star-forming populations below 1mJy using a combination of multi-wavelength data from Spitzer, GMRT, CFHT, Chandra and XMM-Newton. The many discriminators include MIR colours, MIR/radio flux ratios, X-ray luminosities/spectra, optical spectra, radio morphologies and radio spectra. We can now derive the source counts seperately for AGN and star-forming galaxies confirming that the latter population dominate at faint flux densities. We also derive the star-formation rate density from radio sources across 0
Dwelly Tom
McHardy Ian
Moss Derek
Page Mat
Seymour Nick
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