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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/29714
Title: An ALMA survey of submillimeter galaxies in the COSMOS field: Multiwavelength counterparts and redshift distribution
Authors: Brisbin, Drew
Miettinen, Oskari
Aravena, Manuel
Smolčić, Vernesa
DELVECCHIO, IVAN 
Jiang, Chunyan
Magnelli, Benjamin
Albrecht, Marcus
Arancibia, Alejandra Muñoz
Aussel, Hervé
Baran, Nikola
Bertoldi, Frank
Béthermin, Matthieu
Capak, Peter
Casey, Caitlin M.
Civano, Francesca
Hayward, Christopher C.
Ilbert, Olivier
Karim, Alexander
Le Fevre, Olivier
MARCHESI, STEFANO 
McCracken, Henry Joy
Navarrete, Felipe
Novak, Mladen
Riechers, Dominik
Padilla, Nelson
Salvato, Mara
Scott, Kimberly
Schinnerer, Eva
Sheth, Kartik
Tasca, Lidia
Issue Date: 2017
Journal: ASTRONOMY & ASTROPHYSICS
Number: 608
First Page: A15
Abstract: We carried out targeted ALMA observations of 129 fields in the COSMOS region at 1.25 mm, detecting 152 galaxies at S/N ≥ 5 with 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 \tilde{z=2}.48 ± 0.05. We find that brighter millimeter sources are preferentially found at higher redshifts. Our faintestsources, with S<SUB>1.25 mm</SUB> < 1.25 mJy, have a median redshift of \tilde{z=2}.18 ± 0.09, while the brightest sources, S<SUB>1.25 mm</SUB> > 1.8 mJy, have a median redshift of \tilde{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.
URI: http://hdl.handle.net/20.500.12386/29714
URL: https://www.aanda.org/articles/aa/full_html/2017/12/aa30558-17/aa30558-17.html
ISSN: 0066-4146
DOI: 10.1051/0004-6361/201730558
Bibcode ADS: 2017A&A...608A..15B
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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