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Astron. Astrophys. 338, 442-451 (1998) AcknowledgementsWe would like to thank the referee, Anthony Brown, for helpful suggestions to improve the paper. SF acknowledges grants from the Deutsche Forschungsgemeinschaft (DFG Schwerpunktprogramm `Physics of star formation'). WB acknowledges support under NASA/HST grant GO-07412.01-94A. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1998 Online publication: September 14, 1998 ![]() |