QUEST FOR COSMOS SUBMILLIMETER GALAXY COUNTERPARTS USING CARMA AND VLA: IDENTIFYING THREE HIGH-REDSHIFT STARBURST GALAXIES - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue The Astrophysical Journal Supplement Année : 2012

QUEST FOR COSMOS SUBMILLIMETER GALAXY COUNTERPARTS USING CARMA AND VLA: IDENTIFYING THREE HIGH-REDSHIFT STARBURST GALAXIES

V. Smolcic
  • Fonction : Auteur
F. Navarrete
  • Fonction : Auteur
M. Aravena
M. S. Yun
  • Fonction : Auteur
C. Diener
  • Fonction : Auteur
I. Aretxaga
  • Fonction : Auteur
D. A. Riechers
  • Fonction : Auteur
P. Capak
D. Hughes
  • Fonction : Auteur
A. Karim
  • Fonction : Auteur
E. Schinnerer
G. Wilson
  • Fonction : Auteur

Résumé

We report on interferometric observations at 1.3 mm at 2 `'-3 `' resolution using the Combined Array for Research in Millimeter- wave Astronomy. We identify multi-wavelength counterparts of three submillimeter galaxies (SMGs; F-1mm \textgreater 5.5mJy) in the COSMOS field, initially detected with MAMBO and AzTEC bolometers at low,similar to 10 `'-30 `', resolution. All three sources-AzTEC/C1, Cosbo-3, and Cosbo-8- are identified to coincide with positions of 20 cm radio sources. Cosbo-3, however, is not associated with the most likely radio counterpart, closest to the MAMBO source position, but with that farther away from it. This illustrates the need for intermediate-resolution (similar to 2 `') mm-observations to identify the correct counterparts of single-dish-detected SMGs. All of our three sources become prominent only at NIR wavelengths, and their mm-to-radio flux based redshifts suggest that they lie at redshifts z greater than or similar to 2. As a proof of concept, we show that photometric redshifts can be well determined for SMGs, and we find photometric redshifts of 5.6 +/- 1.2, 1.9(-0.5)(+0.9) , and similar to 4 for AzTEC/C1, Cosbo-3, and Cosbo-8, respectively. Using these we infer that these galaxies have radio-based star formation rates of greater than or similar to 1000 M-circle dot yr(-1) and IR luminosities of similar to 10(13) L-circle dot consistent with properties of high-redshift SMGs. In summary, our sources reflect a variety of SMG properties in terms of redshift and clustering, consistent with the framework that SMGs are progenitors of z similar to 2 and today's passive galaxies.

Dates et versions

hal-01442380 , version 1 (20-01-2017)

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Citer

V. Smolcic, F. Navarrete, M. Aravena, O. Ilbert, M. S. Yun, et al.. QUEST FOR COSMOS SUBMILLIMETER GALAXY COUNTERPARTS USING CARMA AND VLA: IDENTIFYING THREE HIGH-REDSHIFT STARBURST GALAXIES. The Astrophysical Journal Supplement, 2012, 200 (1), ⟨10.1088/0067-0049/200/1/10⟩. ⟨hal-01442380⟩
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