EDP Sciences
Free Access
Issue
A&A
Volume 389, Number 2, July II 2002
Page(s) L47 - L50
Section Letters
DOI https://doi.org/10.1051/0004-6361:20020663
Published online 27 June 2002


A&A 389, L47-L50 (2002)
DOI: 10.1051/0004-6361:20020663

Letter

An unusual iron Lo-BAL quasar detected by ISOCAM

P.-A. Duc1, 2, P. B. Hall3, D. Fadda4, P. Chanial2, D. Elbaz2, P. Monaco5, E. Pompei6, B. M. Poggianti7, H. Flores8, A. Franceschini9, A. Biviano10, A. Moorwood11 and C. Cesarsky11

1  CNRS URA 2052
2  CEA, DSM, DAPNIA, Service d'Astrophysique, 91191 Gif-sur-Yvette Cedex, France
3  Pontificia Universidad Católica de Chile, Departamento de Astronomía y Astrofísica, Casilla 306, Santiago 22, Chile and Princeton University Observatory, Princeton, NJ 08544-1001, USA
4  Instituto de Astrofisica de Canarias, Via Lactea s/n, 38200 La Laguna - Tenerife, Spain
5  Dipartimento di Astronomia, via G.B. Tiepolo 11, 34131 Trieste, Italy
6  European Southern Observatory, Santiago
7  Osservatorio Astronomico di Padova, vicolo dell'Osservatorio 5, 35122 Padova, Italy
8  DAEC/LUL, Observatoire de Paris-Meudon, 5 place Jules Janssen, 92195 Meudon, France
9  Dipartimento di Astronomia, Università di Padova, Vicolo dell'Osservatorio, 5, 35122 Padova, Italy
10  INAF - Osservatorio Astronomico di Trieste, via G.B. Tiepolo, 11, 34131 Trieste, Italy
11  European Southern Observatory, Karl-Schwarzschild-Strasse, 2, 85748 Garching bei München, Germany

(Received 8 March 2002 / Accepted 2 May 2002 )

Abstract
We report the discovery of an unusual low-ionization broad absorption line quasar at z=1.776 which exhibits absorption lines from many excited states of Fe II. This member of the rare class of "FeLoBAL" quasars was serendipitously found in a mid-infrared (MIR) survey of distant clusters carried out with the ISOCAM camera. ISO J005645.1-273816 has a high MIR to UV luminosity ratio, suggesting a strong dust obscuration plus emission from very hot dust. This characteristic makes MIR surveys particularly efficient at detecting LoBAL quasars.


Key words: quasars: absorption lines -- quasars: individual: ISO J005645.1-273816 -- infrared: galaxies

Offprint request: P.-A. Duc, paduc@cea.fr

SIMBAD Objects



© ESO 2002

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.