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Herschel-ATLAS: The angular correlation function of submillimetre galaxies at high and low redshift

Maddox, S. J., Dunne, Loretta ORCID:, Rigby, E., Eales, Stephen ORCID:, Cooray, A., Scott, D., Peacock, J. A., Negrello, Mattia ORCID:, Smith, D. J. B., Benford, D., Amblard, A., Auld, R., Baes, M., Bonfield, D., Burgarella, D., Buttiglione, S., Cava, A., Clements, D., Dariush, A., de Zotti, G., Dye, S., Frayer, D., Fritz, J., Gonzalez-Nuevo, J., Herranz, D., Ibar, E., Ivison, R., Jarvis, M. J., Lagache, G., Leeuw, L., Lopez-Caniego, M., Pascale, Enzo ORCID:, Pohlen, M., Rodighiero, G., Samui, S., Serjeant, S., Temi, P., Thompson, M. and Verma, A. 2010. Herschel-ATLAS: The angular correlation function of submillimetre galaxies at high and low redshift. Astronomy and Astrophysics 518 , L11. 10.1051/0004-6361/201014663

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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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Uncontrolled Keywords: submillimeter: galaxies; galaxies: statistics
Publisher: EDP Sciences
ISSN: 00046361
Last Modified: 31 Oct 2022 10:11

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