Astron. Astrophys. 323, 429-441 (1997)

Acknowledgements

We thank Alfred Gautschy for a meticulous referee report which provided many useful suggestions for improvements. This work has benefitted from the SIMBAD bibliographic database compiled and offered by the Center de Donneés Astronomiques in Strasbourg, France. This work was supported in part by the Danish National Research Foundation through its establishment of the Theoretical Astrophysics Center.

© European Southern Observatory (ESO) 1997

Online publication: June 5, 1998

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