Volume 518, July-August 2010
Herschel: the first science highlights
|Number of page(s)||5|
|Published online||16 July 2010|
Letter to the Editor
Herschel-ATLAS: The angular correlation function of submillimetre galaxies at high and low redshift*
School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD, UK e-mail: email@example.com
2 School of Physics and Astronomy, Cardiff University, The Parade, Cardiff, CF24 3AA, UK
3 Dept. of Physics & Astronomy, University of California, Irvine, CA 92697, USA
4 University of British Colombia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada
5 SUPA, Institute for Astronomy, University of Edinburgh, Royal Observatory Edinburgh, Edinburgh, EH9 3HJ, UK
6 Dept. of Physics and Astronomy, The Open University, Milton Keynes, MK7 6AA, UK
7 Astrophysics Branch, NASA Ames Research Center, Mail Stop 245-6, Moffett Field, CA 94035, USA
8 Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, 9000 Gent, Belgium
9 Centre for Astrophysics Research, Science and Technology Research Centre, University of Hertfordshire, Herts AL10 9AB, UK
10 Laboratoire d'Astrophysique de Marseille, UMR6110 CNRS, 38 Rue F. Joliot-Curie, 13388 Marseille, France
11 University of Padova, Department of Astronomy, Vicolo Osservatorio 3, 35122 Padova, Italy
12 Instituto de Astrofísica de Canarias, C/Vía Láctea s/n, 38200 La Laguna, Spain
13 Departamento de Astrofísica, Universidad de La Laguna (ULL), 38205 La Laguna, Tenerife, Spain
14 Astrophysics Group, Imperial College, Blackett Laboratory, Prince Consort Road, London SW7 2AZ, UK
15 Infrared Processing and Analysis Center, California Institute of Technology, 770 South Wilson Av, Pasadena, CA 91125, USA
16 Scuola Internazionale Superiore di Studi Avanzati, via Beirut 2–4, 34151 Triest, Italy
17 Instituto de Física de Cantabria (CSIC-UC), Santander, 39005, Spain
18 UK Astronomy Technology Center, Royal Observatory Edinburgh, Edinburgh, EH9 3HJ, UK
19 Institut d'Astrophysique Spatiale (IAS), Bâtiment 121, 91405 Orsay, France; and Université Paris-Sud 11 and CNRS (UMR 8617), France
20 Oxford Astrophysics, Denys Wilkinson Building, University of Oxford, Keble Road, Oxford, OX1 3RH, UK
Accepted: 11 May 2010
We present measurements of the angular correlation function of galaxies selected from the first field of the H-ATLAS survey. Careful removal of the background from galactic cirrus is essential, and currently dominates the uncertainty in our measurements. For our 250 μm-selected sample we detect no significant clustering, consistent with the expectation that the 250 μm-selected sources are mostly normal galaxies at z 1. For our 350 μm and 500 μm-selected samples we detect relatively strong clustering with correlation amplitudes A of 0.2 and 1.2 at 1', but with relatively large uncertainties. For samples which preferentially select high redshift galaxies at z~2–3 we detect significant strong clustering, leading to an estimate of r0 ~ 7–11 h-1 Mpc. The slope of our clustering measurements is very steep, δ ~ 2. The measurements are consistent with the idea that sub-mm sources consist of a low redshift population of normal galaxies and a high redshift population of highly clustered star-bursting galaxies.
Key words: submillimeter: galaxies / galaxies: statistics
© ESO, 2010
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