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

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

Research output: Contribution to journalArticlepeer-review

Abstract

We present colour-colour diagrams of detected sources in theHerschel-ATLAS science demonstration field from 100 to 500 μm usingboth PACS and SPIRE. We fit isothermal modified black bodies to thespectral energy distribution (SED) to extract the dust temperature ofsources with counterparts in Galaxy And Mass Assembly (GAMA) or SDSSsurveys with either a spectroscopic or a photometric redshift. For asubsample of 330 sources detected in at least three FIR bands with asignificance greater than 3σ, we find an average dust temperatureof (28±8) K. For sources with no known redshift, we populate thecolour-colour diagram with a large number of SEDs generated with a broadrange of dust temperatures and emissivity parameters, and compare tocolours of observed sources to establish the redshift distribution ofthis sample. For another subsample of 1686 sources with fluxes above 35mJy at 350 μm and detected at 250 and 500 μm with a significancegreater than 3σ, we find an average redshift of 2.2±0.6. Herschel is an ESA space observatory with science instruments providedby European-led Principal Investigator consortia and with importantparticipation from NASA.
Original languageEnglish
Article numberL9
Number of pages5
JournalAstronomy & Astrophysics
Volume518
Early online date16 Jul 2010
DOIs
Publication statusPublished - Jul 2010

Keywords

  • submillimeter: galaxies
  • Galaxy: evolution
  • galaxies: high-redshift

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