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, Simon Driver, J. Dunlop, L. Dunne, S. Dye, S. Eales, D. Frayer, J. Fritz, J. 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 Derwerf, A. Verma, J. Vieira, C. Vlahakis

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    101 Citations (Scopus)

    Abstract

    We present colour-colour diagrams of detected sources in the Herschel-ATLAS science demonstration field from 100 to $500~\mu$m 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 3$\sigma $, we find an average dust temperature of $(28 \pm 8)$ 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 $350~\mu$m and detected at 250 and $500~\mu$m with a significance greater than 3$\sigma $, we find an average redshift of $2.2 \pm 0.6$.
    Original languageEnglish
    Article numberL9
    JournalAstronomy & Astrophysics
    Volume518
    Issue number2010
    DOIs
    Publication statusPublished - 2010

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