Astron. Astrophys. 363, 1005-1012 (2000)

Acknowledgements

This work has been funded by the KBN grants 2P03D00418, 2P03D01413, and 2P03D02117 and the CNRS/PAN program Jumelage Astrophysique. SR, MD and JD are grateful to Abdus Salam ICTP, the IAEA and the UNESCO for hospitality at Trieste, Italy, and to Department of Science and Technology, Govt. of India for a grant no. SP/S2/K18/96. The numerical calculations have been performed on computers purchased thanks to a special grant from the SPM and SDU departments of CNRS.

© European Southern Observatory (ESO) 2000

Online publication: December 5, 2000
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