An ALMA Survey of Submillimeter Galaxies in the Extended Chandra Deep Field South: Source Catalog and Multiplicity
Journal article, 2013
We present an Atacama Large Millimeter/submillimeter Array (ALMA) Cycle 0 survey of 126 submillimeter sources from the LABOCA ECDFS Submillimeter Survey (LESS). Our 870 mu m survey with ALMA (ALESS) has produced maps similar to 3x deeper and with a beam area similar to 200x smaller than the original LESS observations, doubling the current number of interferometrically-observed submillimeter sources. The high resolution of these maps allows us to resolve sources that were previously blended and accurately identify the origin of the submillimeter emission. We discuss the creation of the ALESS submillimeter galaxy (SMG) catalog, including the main sample of 99 SMGs and a supplementary sample of 32 SMGs. We find that at least 35% (possibly up to 50%) of the detected LABOCA sources have been resolved into multiple SMGs, and that the average number of SMGs per LESS source increases with LESS flux density. Using the (now precisely known) SMG positions, we empirically test the theoretical expectation for the uncertainty in the single-dish source positions. We also compare our catalog to the previously predicted radio/mid-infrared counterparts, finding that 45% of the ALESS SMGs were missed by this method. Our similar to 1 ''.6 resolution allows us to measure a size of similar to 9 kpc x 5 kpc for the rest-frame similar to 300 mu m emission region in one resolved SMG, implying a star formation rate surface density of 80 M-circle dot yr(-1) kpc(-2), and we constrain the emission regions in the remaining SMGs to be <10 kpc. As the first statistically reliable survey of SMGs, this will provide the basis for an unbiased multiwavelength study of SMG properties.
midinfrared
submillimeter: galaxies
counterparts
star-forming galaxies
degree extragalactic survey
major mergers
high-redshift
cosmos field
number counts
catalogs
1.4 ghz survey
galaxies: starburst
molecular gas
laboca survey
galaxies: high-redshift
Author
J. A. Hodge
Max Planck Society
A. Karim
Durham University
I. Smail
Durham University
A. M. Swinbank
Durham University
F. Walter
Max Planck Society
A. D. Biggs
European Southern Observatory (ESO)
R. J. Ivison
Royal Observatory
University of Edinburgh
A. Weiss
Max Planck Society
D. M. Alexander
Durham University
F. Bertoldi
University of Bonn
W. N. Brandt
Pennsylvania State University
S. C. Chapman
University of Cambridge
Dalhousie University
K. E. K. Coppin
McGill University
P. Cox
Institut de Radioastronomie Millimétrique (IRAM)
A. L. R. Danielson
Durham University
H. Dannerbauer
University of Vienna
C. De Breuck
European Southern Observatory (ESO)
R. Decarli
Max Planck Society
A. C. Edge
Durham University
T. R. Greve
University College London (UCL)
Kirsten Kraiberg Knudsen
Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics
K. M. Menten
Max Planck Society
H. W. Rix
Max Planck Society
E. Schinnerer
Max Planck Society
J. M. Simpson
Durham University
J. L. Wardlow
University of California at Irvine (UCI)
P. van der Werf
Leiden University
Astrophysical Journal
0004-637X (ISSN) 1538-4357 (eISSN)
Vol. 768 1 91Subject Categories
Astronomy, Astrophysics and Cosmology
Roots
Basic sciences
DOI
10.1088/0004-637X/768/1/91