Herschel-ATLAS: Dust temperature and redshift distribution of SPIRE and PACS detected sources using submillimetre colours

Amblard, A.; Cooray, A.; Serra, P.; Temi, P.; Barton, E.; Negrello, M.; Auld, R.; Baes, M.; Baldry, I. K.; Bamford, S.; Blain, A.; Bock, J.; Bonfield, D.; Burgarella, D.; Buttiglione, S.; Cameron, E.; Cava, A.; Clements, D.; Croom, S.; Dariush, A.; de Zotti, G.; Driver, S.; Dunlop, J.; Dunne, L.; Dye, S.; Eales, S.; Frayer, D.; Fritz, J.; Gardner, Jonathan P.; Gonzalez-Nuevo, J.; Herranz, D.; Hill, D.; Hopkins, A.; Hughes, D. H.; Ibar, E.; Ivison, R. J.; Jarvis, M.; Jones, D. H.; Kelvin, L.; Lagache, G.; Leeuw, L.; Liske, J.; Lopez-Caniego, M.; Loveday, J.; Maddox, S.; Michałowski, M.; Norberg, P.; Parkinson, H.; Peacock, J. A.; Pearson, C.; Pascale, E.; Pohlen, M.; Popescu, C.; Prescott, M.; Robotham, A.; Rigby, E.; Rodighiero, G.; Samui, S.; Sansom, A.; Scott, D.; Serjeant, S.; Sharp, R.; Sibthorpe, B.; Smith, D. J. B.; Thompson, M. A.; Tuffs, R.; Valtchanov, I.; van Kampen, E.; van der Werf, P.; Verma, A.; Vieira, J.; Vlahakis, C.
Bibliographical reference

Astronomy and Astrophysics, Volume 518, id.L9

Advertised on:
7
2010
Number of authors
72
IAC number of authors
1
Citations
119
Refereed citations
110
Description
We present colour-colour diagrams of detected sources in the Herschel-ATLAS science demonstration field from 100 to 500 μm using both PACS and SPIRE. We fit isothermal modified black bodies to the spectral energy distribution (SED) to extract the dust temperature of sources with counterparts in Galaxy And Mass Assembly (GAMA) or SDSS surveys with either a spectroscopic or a photometric redshift. For a subsample of 330 sources detected in at least three FIR bands with a significance greater than 3σ, we find an average dust temperature of (28±8) K. For sources with no known redshift, we populate the colour-colour diagram with a large number of SEDs generated with a broad range of dust temperatures and emissivity parameters, and compare to colours of observed sources to establish the redshift distribution of this sample. For another subsample of 1686 sources with fluxes above 35 mJy at 350 μm and detected at 250 and 500 μm with a significance greater than 3σ, we find an average redshift of 2.2±0.6. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.
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Formation and Evolution of Galaxies: Observations in Infrared and other Wavelengths
This IAC research group carries out several extragalactic projects in different spectral ranges, using space as well as ground-based telescopes, to study the cosmological evolution of galaxies and the origin of nuclear activity in active galaxies. The group is a member of the international consortium which built the SPIRE instrument for the
Ismael
Pérez Fournon