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An ALMA survey of submillimeter galaxies in the COSMOS field: Multiwavelength counterparts and redshift distribution

Brisbin, Drew and Capak, Peter (2017) An ALMA survey of submillimeter galaxies in the COSMOS field: Multiwavelength counterparts and redshift distribution. Astronomy and Astrophysics, 608 . Art. No. A15. ISSN 0004-6361.

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We carried out targeted ALMA observations of 129 fields in the COSMOS region at 1.25 mm, detecting 152 galaxies at S/N ≥ 5with an average continuum RMS of 150 μJy. These fields represent a S/N-limited sample of AzTEC/ASTE sources with 1.1 mm S/N≥ 4 over an area of 0.72 square degrees. Given ALMA’s fine resolution and the exceptional spectroscopic and multiwavelength photometric data available in COSMOS, this survey allows us unprecedented power in identifying submillimeter galaxy counterparts and determining their redshifts through spectroscopic or photometric means. In addition to 30 sources with prior spectroscopic redshifts, we identified redshifts for 113 galaxies through photometric methods and an additional nine sources with lower limits, which allowed a statistically robust determination of the redshift distribution. We have resolved 33 AzTEC sources into multi-component systems and our redshifts suggest that nine are likely to be physically associated. Our overall redshift distribution peaks at z ~ 2.0 with a high-redshift tail skewing the median redshift to z = 2.48 ± 0.05. We find that brighter millimeter sources are preferentially found at higher redshifts. Our faintestsources, with S_(1.25 mm) < 1.25 mJy, have a median redshift of z = 2.18 ± 0.09, while the brightest sources, S_(1.25 mm) > 1.8 mJy, have a median redshift of z = 3.08 ± 0.17. After accounting for spectral energy distribution shape and selection effects, these results are consistent with several previous submillimeter galaxy surveys, and moreover, support the conclusion that the submillimeter galaxy redshift distribution is sensitive to survey depth.

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URLURL TypeDescription Paper
Brisbin, Drew0000-0002-4795-419X
Additional Information:© 2017 ESO. Article published by EDP Sciences. Received 3 February 2017; Accepted 21 August 2017; Published online 29 November 2017. We thank the anonymous referee for insightful comments and advice. D.B. acknowledges partial support from ALMA-CONICYT FUND No. 31140010. and FONDECYT postdoctorado project 3170974. M.A. acknowledges partial support from FONDECYT through grant 1140099. V.S., O.M. and I.D. acknowledge funding from the European Union’s Seventh Framework program under grant agreement 337595 (ERC Starting Grant, “CoSMass”). The work of O.M. was performed in part at the Aspen Center for Physics, which is supported by National Science Foundation grant PHY-1066293. The work of O.M. was partially supported by a grant from the Simons Foundation. A.K. acknowledges support by the Collaborative Research Council 956, sub-project A1, funded by the Deutsche Forschungsgemeinschaft (DFG). C.M.C. thanks UT Austin’s college of natural science for support. D.R. acknowledges support from the National Science Foundation under grant number AST-1614213 to Cornell University. C.J. acknowledges support from Shanghai Municipal Natural Science Foundation (grant 15ZR1446600) The Flatiron Institute is supported by the Simons Foundation. This paper makes use of the following ALMA data: ADS/JAO.ALMA#2013.1.00118.S and 2011.0.00539.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), NSC and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ. This research has made use of data from HerMES project ( HerMES is a Herschel Key Programme utilizing Guaranteed Time from the SPIRE instrument team, ESAC scientists and a mission scientist. HerMES is described in Oliver et al. (2012).
Group:COSMOS, Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)31140010
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)3170974
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)1140099
European Research Council (ERC)337595
Simons FoundationUNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)956
University of Texas at AustinUNSPECIFIED
Shanghai Municipal Natural Science Foundation15ZR1446600
Subject Keywords:galaxies: distances and redshifts – galaxies: evolution – galaxies: statistics – galaxies: high-redshift – catalogs
Record Number:CaltechAUTHORS:20171221-075735416
Persistent URL:
Official Citation:An ALMA survey of submillimeter galaxies in the COSMOS field: Multiwavelength counterparts and redshift distribution. Drew Brisbin, Oskari Miettinen, Manuel Aravena, Vernesa Smolčić, Ivan Delvecchio, Chunyan Jiang, Benjamin Magnelli, Marcus Albrecht, Alejandra Muñoz Arancibia, Hervé Aussel, Nikola Baran, Frank Bertoldi, Matthieu Béthermin, Peter Capak, Caitlin M. Casey, Francesca Civano, Christopher C. Hayward, Olivier Ilbert, Alexander Karim, Olivier Le Fevre, Stefano Marchesi, Henry Joy McCracken, Felipe Navarrete, Mladen Novak, Dominik Riechers, Nelson Padilla, Mara Salvato, Kimberly Scott, Eva Schinnerer, Kartik Sheth and Lidia Tasca. A&A, 608 (2017) A15. DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84000
Deposited By: Tony Diaz
Deposited On:21 Dec 2017 17:07
Last Modified:21 Dec 2017 17:07

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