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z > 4 low luminosity dusty galaxy candidates in the Frontier Fields A2744, AS1063 and A370

Published online by Cambridge University Press:  27 October 2016

Frédéric Boone ,
Daniel Schaerer ,
Johan Richard ,
Benjamin Clément ,
Eiichi Egami ,
Tim Rawle ,
Dieter Lutz ,
Axel Weiss ,
Johannes G. Staguhn  and
HLS team
Frédéric Boone
Affiliation:
Université Paul Sabatier, CNRS, IRAP, 14 Avenue E. Belin, 31400, Toulouse, France email: [email protected]
Daniel Schaerer
Affiliation:
Observatoire de Genève, Département d'Astronomie, Université de Genève, 51 Ch. des Maillettes, 1290, Versoix, Switzerland
Johan Richard
Affiliation:
CRAL, Observatoire de Lyon, Université de Lyon 1, 9 avenue Ch. André, F-69561 Saint-Genis Laval, France
Benjamin Clément
Affiliation:
CRAL, Observatoire de Lyon, Université de Lyon 1, 9 avenue Ch. André, F-69561 Saint-Genis Laval, France
Eiichi Egami
Affiliation:
Steward Observatory, University of Arizona, 933 N. Cherry Ave, Tucson, AZ 85721, USA
Tim Rawle
Affiliation:
ESA / Space Telescope Science Institute (STScI), 3700 San Martin Drive, Baltimore, MD 21218, USA
Dieter Lutz
Affiliation:
Max-Planck-Institut für extraterrestrische Physik, 85741 Garching, Germany
Axel Weiss
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121, Bonn, Germany
Johannes G. Staguhn
Affiliation:
Observational Cosmology Lab, Code 665, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
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Abstract

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We have conducted a LABOCA 870 μm follow-up of ten massive lensing clusters of the Herschel Lensing Survey (HLS, Egami et al. 2010) aiming at unveiling the yet hidden part of dusty star formation in the distant Universe. Among these clusters, A2744 and AS1063 are part of the Frontier Fields HST program. We also obtained 2 mm bolometer observations of A2744 and A370 with the GISMO array at the IRAM 30 m. We detected sources that are undetected with Herschel (PACS and SPIRE) implying either a very high redshift (z > 4) or a very low dust temperature (T<25 K). Their flux also imply a low intrinsic luminosity, LFIR < 1012L⊙. Some of them are extended and could correspond to multiple sources or to multiple images of a lensed source. Substructures in the Sunyaev-Zeldovich effect could also contribute this very red submm emission. An ALMA program is ongoing to unveil the nature of these sources.

Keywords

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Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , General Assembly A29B: Astronomy in Focus , August 2015 , pp. 818 - 819
Copyright
Copyright © International Astronomical Union 2016 

References

Boone, F., Clément, B., Richard, J., et al. 2013, A&A, 559, L1 Google Scholar
Egami, E., Rex, M., Rawle, T. D., et al. 2010, A&A, 518, L12 Google Scholar