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Astron. Astrophys. 364, 137-156 (2000) AcknowledgementsLD acknowledges support from the Science Foundation of Flanders. BP thanks S. Johansson and the staff of the atomic spectroscopy division at Lund university for their hospitality during part of this work. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France.
© European Southern Observatory (ESO) 2000 Online publication: December 15, 2000 ![]() |