THE LARGE APEX BOLOMETER CAMERA SURVEY OF THE EXTENDED CHANDRA DEEP FIELD SOUTH
- Max-Planck Institut fuer Radioastronomy, Auf dem Huegel 69, 53121 Bonn (Germany)
- Institute for Computational Cosmology, Durham University, South Road, Durham, DH1 3LE (United Kingdom)
- MPIA, Koenigstuhl 17, 69117 Heidelberg (Germany)
- Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ (United Kingdom)
- Argelander Institute for Astronomy, University of Bonn, Auf dem Huegel 71, D-53121 Bonn (Germany)
- Department of Physics, Durham University, South Road, Durham, DH1 3LE (United Kingdom)
- Department of Astronomy and Astrophysics, 525 Davey Lab, Pennsylvania State University, University Park, PA 16802 (United States)
- Institute of Astronomy, Madingley Road, Cambridge, CB3 0HA (United Kingdom)
- Institut de Radio Astronomie Millimetrique, 300 Rue de la Piscine, Domaine Universitaire, 38406 Saint Martin d'Heres (France)
- European Southern Observatory, Karl-Schwarzschild Strasse, 85748 Garching (Germany)
- Yale Center for Astronomy and Astrophysics, Yale University, New Haven, CT 06520 (United States)
- Max-Planck-Institut fuer extraterrestrische Physik, Postfach 1312, 85741 Garching (Germany)
- Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States)
We present a sensitive 870 mum survey of the Extended Chandra Deep Field South (ECDFS) combining 310 hr of observing time with the Large Apex BOlometer Camera (LABOCA) on the APEX telescope. The LABOCA ECDFS Submillimetre Survey (LESS) covers the full 30' x 30' field size of the ECDFS and has a uniform noise level of sigma{sub 870{sub m}}u{sub m} approx 1.2 mJy beam{sup -1}. LESS is thus the largest contiguous deep submillimeter survey undertaken to date. The noise properties of our map show clear evidence that we are beginning to be affected by confusion noise. We present a catalog of 126 submillimeter galaxies (SMGs) detected with a significance level above 3.7sigma, at which level we expect five false detections given our map area of 1260 arcmin{sup 2}. The ECDFS exhibits a deficit of bright SMGs relative to previously studied blank fields but not of normal star-forming galaxies that dominate the extragalactic background light (EBL). This is in line with the underdensities observed for optically defined high redshift source populations in the ECDFS (BzKs, DRGs, optically bright active galactic nucleus, and massive K-band-selected galaxies). The differential source counts in the full field are well described by a power law with a slope of alpha = -3.2, comparable to the results from other fields. We show that the shape of the source counts is not uniform across the field. Instead, it steepens in regions with low SMG density. Towards the highest overdensities we measure a source-count shape consistent with previous surveys. The integrated 870 mum flux densities of our source-count models down to S{sub 870{sub m}}u{sub m} = 0.5 mJy account for >65% of the estimated EBL from COBE measurements. We have investigated the clustering of SMGs in the ECDFS by means of a two-point correlation function and find evidence for strong clustering on angular scales <1' with a significance of 3.4sigma. Assuming a power-law dependence for the correlation function and a typical redshift distribution for the SMGs we derive a characteristic angular clustering scale of theta{sub 0} = 14'' +- 7'' and a spatial correlation length of r{sub 0} = 13 +- 6 h {sup -1} Mpc.
- OSTI ID:
- 21392571
- Journal Information:
- Astrophysical Journal, Vol. 707, Issue 2; Other Information: DOI: 10.1088/0004-637X/707/2/1201; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
Similar Records
SUBMILLIMETER OBSERVATIONS OF MILLIMETER BRIGHT GALAXIES DISCOVERED BY THE SOUTH POLE TELESCOPE
THE LABOCA SURVEY OF THE EXTENDED CHANDRA DEEP FIELD SOUTH: TWO MODES OF STAR FORMATION IN ACTIVE GALACTIC NUCLEUS HOSTS?