dc.identifier.citation | Bond , N A , Benford , D J , Gardner , J P , Amblard , A , Fleuren , S , Blain , A W , Dunne , L , Smith , D , Maddox , S J , Hoyos , C , Baes , M , Bonfield , D , Bourne , N , Bridge , C , Buttiglione , S , Cava , A , Clements , D , Cooray , A , Dariush , A , de Zotti , G , Driver , S , Dye , S , Eales , S , Eisenhardt , P , Hopwood , R , Ibar , E , Ivison , R J , Jarvis , M J , Kelvin , L , Robotham , A S G , Temi , P , Thompson , M , Tsai , C-W , van der Werf , P , Wright , E L , Wu , J & Yan , L 2012 , ' The infrared properties of sources matched in the WISE all-sky and Herschel ATLAS surveys ' , Astrophysical Journal Letters , vol. 750 , no. 1 , L18 . https://doi.org/10.1088/2041-8205/750/1/L18 | |
dc.description.abstract | We describe the infrared properties of sources detected over similar to 36 deg(2) 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 5 sigma point-source depths of 34 and 0.048 mJy at 250 mu m and 3.4 mu m, respectively, we are able to identify 50.6% of the H-ATLAS sources in the WISE survey, corresponding to a surface density of similar to 630 deg(-2). Approximately two-thirds of these sources have measured spectroscopic or optical/near-IR photometric redshifts of z < 1. For sources with spectroscopic redshifts at z < 0.3, we find a linear correlation between the infrared luminosity at 3.4 mu m and that at 250 mu m, with +/- 50% scatter over similar to 1.5 orders of magnitude in luminosity, similar to 10(9)-10(10.5) L-circle dot. By contrast, the matched sources without previously measured redshifts (r greater than or similar to 20.5) have 250-350 mu m flux density ratios which suggest either high-redshift galaxies (z greater than or similar to 1.5) or optically faint low-redshift galaxies with unusually low temperatures (T less than or similar to 20). Their small 3.4-250 mu m flux ratios favor a high-redshift galaxy population, as only the most actively star-forming galaxies at low redshift (e.g., Lambda rp 220) exhibit comparable flux density ratios. Furthermore, we find a relatively large active galactic nucleus fraction (similar to 30%) in a 12 mu m flux-limited subsample of H-ATLAS sources, also consistent with there being a significant population of high-redshift sources in the no-redshift sample. | en |