Astron. Astrophys. 354, 589-594 (2000)

Acknowledgements

T.A. and C.S. acknowledge financial support from the Belgian Fund for Scientific Research (FWO).

This research has made use of the SIMBAD database operated at C.D.S., Strasbourg, France, and the NASA Astrophysics Data System. The authors are indebted to the referee, Dr. Ennio Poretti, for valuable comments which improved the manuscript.

© European Southern Observatory (ESO) 2000

Online publication: February 9, 2000
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