[en] We report the discovery of the first hyperluminous infrared galaxy (HyLIG) in the course of the European Large Area ISO Survey (ELAIS). This object has been detected by ISO at 6.7, 15 and 90μm, and is found to be a broad-line, radio-quiet quasar at a redshift [formmu4]z=1.099. From a detailed multicomponent model fit of the spectral energy distribution, we derive a total IR luminosity L[SUB]IR[/SUB] [formmu5](1-1000μm)~1.0à 10[SUP]13[/SUP]h65-2L[SUB]solar[/SUB] [formmu6](q[SUB]0[/SUB]=0.5), and discuss the possible existence of a starburst contributing to the far-IR output. Observations to date present no evidence for lens magnification. This galaxy is one of the very few HyLIGs with a X-ray detection. On the basis of its soft X-ray properties, we suggest that this broad-line object may be the face-on analogue of narrow-line, Seyfert-like HyLIGs.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Morel, Thierry ; Astrophysics Group, Imperial College of Science, Technology and Medicine, Blackett Laboratory, Prince Consort Road, London SW7 2BZ
Efstathiou, A.; Astrophysics Group, Imperial College of Science, Technology and Medicine, Blackett Laboratory, Prince Consort Road, London SW7 2BZ
Serjeant, S.; Astrophysics Group, Imperial College of Science, Technology and Medicine, Blackett Laboratory, Prince Consort Road, London SW7 2BZ ; Unit for Space Sciences and Astrophysics, School of Physical Sciences, University of Kent, Canterbury, Kent CT2 7NR
Marquez, I.
Masegosa, J.; Instituto de AstrofÃsica de AndalucÃa, CSIC, Apartado 3004, E-18080, Granada, Spain
Heraudeau, P.
Surace, C.; Astrophysics Group, Imperial College of Science, Technology and Medicine, Blackett Laboratory, Prince Consort Road, London SW7 2BZ
Verma, A.; Astrophysics Group, Imperial College of Science, Technology and Medicine, Blackett Laboratory, Prince Consort Road, London SW7 2BZ ; Max-Planck-Institut für Extraterrestrische Physik, Postfach 1312, D-85741 Garching, Germany
Oliver, S.; Astrophysics Group, Imperial College of Science, Technology and Medicine, Blackett Laboratory, Prince Consort Road, London SW7 2BZ ; Astronomy Centre, University of Sussex, Falmer, Brighton BN1 9QJ
Rowan-Robinson, M.; Astrophysics Group, Imperial College of Science, Technology and Medicine, Blackett Laboratory, Prince Consort Road, London SW7 2BZ
Georgantopoulos, I.; Astronomical Institute, National Observatory of Athens, Lofos Koufou, Palaia Penteli, Athens, GR-15236, Greece
Farrah, D.; Astrophysics Group, Imperial College of Science, Technology and Medicine, Blackett Laboratory, Prince Consort Road, London SW7 2BZ
Alexander, D. M.; SISSA, International School for Advanced Studies, Via Beirut 2-4, 34014 Trieste, Italy ; Pennsylvania State University, Astronomy and Astrophysics, Davey Laboratory, University Park, PA 16802, USA
Perez-Fournon, I.
Willott, C. J.; Astrophysics, Department of Physics, Keble Road, Oxford OX1 3RH
Cabrera-Guerra, F.; Instituto de AstrofÃsica de Canarias, Via Lactea, 38200 La Laguna, Tenerife, Canary Islands, Spain
Gonzalez-Solares, E. A.; Instituto de AstrofÃsica de Canarias, Via Lactea, 38200 La Laguna, Tenerife, Canary Islands, Spain
Cabrera-Lavers, A.; Instituto de AstrofÃsica de Canarias, Via Lactea, 38200 La Laguna, Tenerife, Canary Islands, Spain
Gonzalez-Serrano, J. I.; Instituto de AstrofÃsica de Canarias, Via Lactea, 38200 La Laguna, Tenerife, Canary Islands, Spain ; Instituto de FÃsica de Cantabria (CSIC - Univ. de Cantabria), Facultad de Ciencias, Univ. de Cantabria, 39005 Santander, Spain
Ciliegi, P.; Osservatorio Astronomico di Bologna, via Ranzani 1, 40127 Bologna, Italy
Pozzi, F.; Osservatorio Astronomico di Bologna, via Ranzani 1, 40127 Bologna, Italy
Matute, I.; Dipartimento di Fisica, Universita degli Studi ``Roma TRE'', Via della Vasca Navale 84, I-00146 Roma, Italy
Flores, H.; CEA/SACLAY, 91191 Gif sur Yvette cedex, France