Astron. Astrophys. 323, L9-L12 (1997)

Acknowledgements

We thank R. Bodmer for helpful discussions, and the Pr. J. Geiss who referred this Letter for constructive comments. This work was partly supported by the GDR G131 "Structure Interne" of CNRS (France).

© European Southern Observatory (ESO) 1997

Online publication: June 5, 1998

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