Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21942508b&link_type=abstract
American Astronomical Society, AAS Meeting #219, #425.08
Astronomy and Astrophysics
Astrophysics
Scientific paper
We describe the infrared properties of sources detected over 36 square degrees of sky in the GAMA 15-hr equatorial field, using data from both the Herschel Astrophysical Terahertz Large-Area Survey (H-ATLAS) and Wide-field Infrared Survey (WISE). With point-source depths of 34 and 0.06 mJy at 250 micron and 3.4 micron, respectively, we are able to identify 50.4% of the H-ATLAS sources in the WISE survey, two-thirds of which have measured spectroscopic or optical/near-IR photometric redshifts of z>1.5 based on their small 3.4-250 micron flux ratios, large AGN fraction ( 25%), and small 250-350 micron flux ratios. If these sources have a median redshift of z 2, a comparison to spectral templates of dust-obscured galaxies suggests that these galaxies are forming stars at a rate that would double their mass every half billion years. Finally, for sources with spectroscopic redshifts at z<0.4, we find a linear correlation between the infrared luminosity at 3.4 micron and that at 250 micron, with +- 50% scatter over two orders of magnitude in luminosity, 109 - 1011 solar luminosities.
Benford Dominic
Bond Nicholas A.
Gardner Jeffrey P.
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