We gratefully acknowlegde the PI's and observers of the other HEROS programmes. The current extensive database would not have been possible without their kind co-operation. We thank Drs. Geraldine Peters and Karen Bjorkman for the permission to quote their respective recent observations of o And and Drs. Wolfgang Hummel and Myriam Vrancken for having permitted us to quote their paper prior to its publication. Dr. Stanley Owocki is thanked for having drawn our attention to the importance of observational evidence for disk rotation in the context of the wind-compressed disk model. We gratefully acknowlegde Dr. Wolfgang Hummel for very helpful advice on the quantitative application of the model. The referee, Dr. Michele Floquet, as well as Dr. Petr Harmanec and David McDavid also provided useful suggestions. This study made use of the Simbad and ADS databases. It was supported by the Deutsche Forschungsgemeinschaft (Wo 296/20, 436 TSE 113/18) and the Academy of Sciences and Grant Agency of the Czech Republic (436 TSE 113/18, 202/97/0326).
© European Southern Observatory (ESO) 1999
Online publication: August 13, 199