Issue |
A&A
Volume 518, July-August 2010
Herschel: the first science highlights
|
|
---|---|---|
Article Number | L9 | |
Number of page(s) | 5 | |
Section | Letters | |
DOI | https://doi.org/10.1051/0004-6361/201014586 | |
Published online | 16 July 2010 |
Letter to the Editor
Herschel-ATLAS: Dust temperature and redshift distribution of SPIRE and PACS detected sources using submillimetre colours*
1
Dept. of Physics & Astronomy, University of California, Irvine, CA 92697, USA, e-mail: amblard@uci.edu
2
Astrophysics Branch, NASA Ames Research Center, Mail Stop 245-6, Moffett Field, CA 94035, USA
3
Dept. of Physics and Astronomy, The Open University, Milton Keynes, MK7 6AA, UK
4
School of Physics and Astronomy, Cardiff University, The Parade, Cardiff, CF24 3AA, UK
5
Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, 9000 Gent, Belgium
6
Astrophysics Research Institute, Liverpool John Moores University, 12 Quays House, Egerton Wharf, Birkenhead, CH41 1LD, UK
7
School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD, UK
8
Caltech, 249-17, Pasadena, CA 91125, USA
9
Jet Propulsion Laboratory, Pasadena, CA 91109; Department of Astronomy, California Institute of Technology, Pasadena, CA 91125, USA
10
Centre for Astrophysics Research, Science and Technology Research Centre, University of Hertfordshire, Herts AL10 9AB, UK
11
Laboratoire d'Astrophysique de Marseille, UMR6110 CNRS, 38 rue F. Joliot-Curie, 13388 Marseille, France
12
INAF - Osservatorio Astronomico di Padova, Vicolo Osservatorio 5, 35122 Padova, Italy
13
ETH Zurich, Insitute for Astronomy, HIT J12.3, 8093 Zurich, Switzerland
14
Instituto de Astrofísica de Canarias, C/Vía Láctea s/n, 38200 La Laguna;
Departamento de Astrofísica, Universidad de La Laguna (ULL), 38205 La Laguna, Tenerife, Spain
15
Astrophysics Group, Imperial College, Blackett Laboratory, Prince Consort Road, London SW7 2AZ, UK
16
Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006, Australia
17
Scuola Internazionale Superiore di Studi Avanzati, via Beirut 2-4, 34151 Triest, Italy
18
SUPA, School of Physicsand Astronomy, University of St. Andrews, North Haugh, St. Andrews, KY169SS, UK
19
Scottish Universities Physics Alliance, Institute for Astronomy, University of Edinburgh, Edinburgh, EH9 3HJ, UK
20
Infrared Processing and Analysis Center, California Institute of Technology, 770 South Wilson Av, Pasadena, CA 91125, USA
21
NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
22
Instituto de Física de Cantabria (CSIC-UC), Santander, 39005, Spain
23
Anglo-Australian Observatory, PO Box 296, Epping, NSW 1710, Australia
24
Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE), Luis Enrique Erro No. 1, Tonantzintla, Puebla, C.P. 72840, Mexico
25
UK Astronomy Technology Center, Royal Observatory Edinburgh, Edinburgh, EH9 3HJ, UK
26
Institut d'Astrophysique Spatiale (IAS), Bâtiment 121, 91405 Orsay; and Université Paris-Sud 11 and CNRS (UMR 8617), France
27
European Southern Observatory, Karl-Schwarzschild-Strasse 2 85748, Garching bei Munchen, Germany
28
Astronomy Centre, University of Sussex, Falmer, Brighton, BN1 9QH, UK
29
Space Science & Technology Department CCLRC RAL, Rutherford Appleton Laboratory Oxon, OX11 0QX, UK
30
Institute for Space Imaging Science, University of Lethbridge, Lethbridge, Alberta, T1K 3M4, Canada
31
Jeremiah Horrocks Institute, University of Central Lancashire, Preston, Lancs PR1 2HE, UK
32
University of Padova, Department of Astronomy, Vicolo Osservatorio 3, 35122 Padova, Italy
33
Dept. of Physics & Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, B.C. V6T 1Z1, Canada
34
Max Planck Institute for Nuclear Astrophysics (MPIK), Saupfercheckweg 1, 69117 Heidelberg, Germany
35
Herschel Science Centre, ESAC, ESA, PO Box 78, Villanueva de la Cañada, 28691 Madrid, Spain
36
Sterrewacht Leiden, Leiden University, PO Box 9513, 2300 RA Leiden, The Netherlands
37
Oxford Astrophysics, Denys Wilkinson Building, University of Oxford, Keble Road, Oxford, OX1 3RH, UK
Received:
30
March
2010
Accepted:
26
April
2010
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.
Key words: submillimeter: galaxies / Galaxy: evolution / galaxies: high-redshift
© ESO, 2010
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