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Astron. Astrophys. 347, 809-820 (1999)


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Proposed identification of Hubble Deep Field submillimeter source HDF 850.1

D. Downes 1, R. Neri 1, A. Greve 1, S. Guilloteau 1, F. Casoli 2, D. Hughes 3,4, D. Lutz 5, K.M. Menten 6, D.J. Wilner 7, P. Andreani 8, F. Bertoldi 6, C.L. Carilli 9, J. Dunlop 3, R. Genzel 5, F. Gueth 6, R.J. Ivison 10, R.G. Mann 11, Y. Mellier 2,12, S. Oliver 11, J. Peacock 3, D. Rigopoulou 5, M. Rowan-Robinson 11, P. Schilke 6, S. Serjeant 11, L.J. Tacconi 5 and M. Wright 13

1 Institut de Radio Astronomie Millimétrique, Domaine Universitaire, F-38406 St. Martin d'Hères, France
2 DEMIRM, Observatoire de Paris, 61 av. de l'Observatoire, F-75014 Paris, France, and UMR 8540 du CNRS
3 Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UK
4 Instituto Nacional de Astrofisica, Optica y Electronica (INAOE), Apartado Postal 51 y 216, 72000 Puebla, Pue., Mexico
5 Max-Planck-Institut für Extraterrestrische Physik, D-85748 Garching bei München, Germany
6 Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
7 Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA
8 Dipartimento di Astronomia, Università di Padova, vicolo dell'Osservatorio 5, I-35122 Padova, Italy
9 National Radio Astronomy Observatory, P.O. Box O, Socorro, NM 87801, USA
10 Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, UK
11 Astrophysics Group, Imperial College London, Blackett Laboratory, Prince Consort Road, London SW7 2BZ, UK
12 Institut d'Astrophysique, 98bis, Bd Arago, F-75014 Paris, France
13 Radio Astronomy Laboratory, University of California, Berkeley, CA 94720, USA

Received 8 April 1999 / Accepted 12 May 1999

Abstract

The IRAM Interferometer has been used to detect the submillimeter source HDF 850.1 found by Hughes et al. (1998) in the Hubble Deep Field. The flux density measured at 1.3 mm (236 GHz) is 2.2[FORMULA] mJy, in agreement with the flux density measured at the JCMT. The flux densities and upper limits measured at 3.4, 2.8, 1.3, 0.85, and 0.45 mm show that the emission comes from dust. We suggest that the 1.3 mm dust source is associated with the optical arc-like feature, 3-593.0, that has a photometric redshift [FORMULA]. If the HDF 850.1 is at this redshift and unlensed, its spectral energy distribution, combined with that of 3-593.0, matches closely that of the ultraluminous galaxy VII Zw 31. Another possibility is that the dust source may be gravitationally lensed by the elliptical galaxy 3-586.0 at [FORMULA].

The position of the dust source agrees within the errors with that of the tentative VLA radio source 3651+1226.

Key words: galaxies: individual: HDF 850.1 – galaxies: ISM – galaxies: structure – cosmology: observations

Send offprint requests to: D. Downes (downes@iram.fr)

© European Southern Observatory (ESO) 1999

Online publication: June 6, 1999

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