![]() | ![]() |
Astron. Astrophys. 349, 243-252 (1999) AcknowledgementsThis work was supported by the Austrian Science Fund (FWF, project number S7305-AST) and the Austrian Academy of Sciences (RL acknowledges a "Doktorandenstipendium"). We thank E.A Dorfi (IfA Vienna) for inspiring discussions. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1999 Online publication: August 25, 1999 ![]() |