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

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 s...

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Автори: Maddox, S, Dunne, L, Rigby, E, Eales, S, Cooray, A, Scott, D, Peacock, J, Negrello, M, Smith, D, 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
Формат: Journal article
Мова:English
Опубліковано: 2010
Опис
Резюме: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. © ESO, 2010.