Astron. Astrophys. 319, 487-497 (1997)

Acknowledgements

We are grateful to D. Alexander and F. Rogers for making available their opacity tables to us. Thanks also go to G. Piotto and I. Saviane for providing us with their observational data before publication and to A. Chieffi and O. Straniero for making available to us their calculated isochrones. We appreciate instructive discussions with G. Raffelt and V. Castellani and the careful reading of the manuscript by H. Ritter, who also directed our attention to homology relations for shell burning stars. We also acknowledge the work of our referee, Dr. F.J. Swenson, whose critical remarks have led to a significant improvement of the present paper. Part of the work of A.W. and S.D'I. was supported by the "Sonderforschungsbereich 375 für Astro-Teilchenphysik der Deutsche Forschungsgemeinschaft".

© European Southern Observatory (ESO) 1997

Online publication: July 3, 1998
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