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Herschel-ATLAS: The angular correlation function of submillimetre galaxies at high and low redshift*
- Source :
- Astronomy and Astrophysics; July 2010, Vol. 518 Issue: 10
- Publication Year :
- 2010
-
Abstract
- 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$\la$1. For our 350 μm and 500 μm-selected samples we detect relatively strong clustering with correlation amplitudes Aof 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-1Mpc. 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.
Details
- Language :
- English
- ISSN :
- 00046361 and 14320746
- Volume :
- 518
- Issue :
- 10
- Database :
- Supplemental Index
- Journal :
- Astronomy and Astrophysics
- Publication Type :
- Periodical
- Accession number :
- ejs21783875