emission lines
using the VLT Kueyen-FORS2-MXU.
We tested a prediction of the hybrid version of the theory of
global oscillations in Be star circumstellar disks
in the metal-deficient environment of the Be star rich SMC cluster
NGC 330. We found that the relative number of Be stars with disks
showing global disk oscillations is the same as for Galactic field Be stars.
Hence early type Be stars can host a GDO also under conditions
of a considerably reduced optically thin line force, in contradiction
to predictions of the hybrid model for GDOs. We suppose that the
reduced line force in NGC 330 generally does not prevent the formation GDOs but
rather increases the confinement radius, which would result in a
larger mean cycle time for V/R variations in NGC 330.
Acknowledgements
The funding through "Verbundforschung Astronomie'' by the Bundesministerium für Forschung und Technologie BMBF grants 05AV9WM12, 05AV9MGA and 05AV9V0A6 is gratefully acknowledged. We thank the referee John Telting for his valuable comments on the selection effects. We thank the VIRMOS Consortium for cooperation in all matters regarding the Mask Manufacturing Unit.
Copyright ESO 2001