An ALMA Survey of Submillimeter Galaxies in the Extended Chandra Deep Field South: Source Catalog and Multiplicity
Artikel i vetenskaplig tidskrift, 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.


submillimeter: galaxies


star-forming galaxies

degree extragalactic survey

major mergers


cosmos field

number counts


1.4 ghz survey

galaxies: starburst

molecular gas

laboca survey

galaxies: high-redshift


J. A. Hodge


A. Karim

Durham University

I. Smail

Durham University

A. M. Swinbank

Durham University

F. Walter


A. D. Biggs

European Southern Observatory (ESO)

R. J. Ivison

Royal Observatory

University of Edinburgh

A. Weiss


D. M. Alexander

Durham University

F. Bertoldi

Universität 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 Millimetrique (IRAM)

A. L. R. Danielson

Durham University

H. Dannerbauer

Universität Wien

C. De Breuck

European Southern Observatory (ESO)

R. Decarli


A. C. Edge

Durham University

T. R. Greve

University College London (UCL)

Kirsten Kraiberg Knudsen

Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik

K. M. Menten


H. W. Rix


E. Schinnerer


J. M. Simpson

Durham University

J. L. Wardlow

University of California at Irvine (UCI)

P. van der Werf

Universiteit Leiden

Astrophysical Journal

0004-637X (ISSN) 1538-4357 (eISSN)

Vol. 768 1 91


Astronomi, astrofysik och kosmologi


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