Other
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21543524h&link_type=abstract
American Astronomical Society, AAS Meeting #215, #435.24; Bulletin of the American Astronomical Society, Vol. 42, p.383
Other
Scientific paper
We present Spitzer 24-micron observations of the Hubble Deep Field South region. The observations cover about 250 sq arcmin and reach approximately 15 microJy rms in the most sensitive regions, resulting in 495 catalogued sources (> 5 sigma). We present completeness corrected source counts and find that while they are broadly consistent with other well-studied fields there are signs of significant field to field variations in the counts, especially at the bright end. To study the FIR-radio correlation the 24 micron sources are matched to 1.4 GHz radio sources from the ATHDFS survey. We explore the observed IR-radio flux density ratio (q24) as a function of redshift and find values similar to that in the literature but with a possible decrease at high redshift (z > 1). The IR-radio flux density ratios observed at high redshift (z > 1) broadly agree with the SED tracks of galaxies of similar luminosity at low redshift.
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