Astron. Astrophys. 359, 337-346 (2000)

Acknowledgements

This work is supported by a Grant-in-Aid in Scientific Research from the Japanese Ministry of Science, Sports and Culture, and also by the Australian Research Council. GR, JH, MR & TY acknowledge the receipt of JSPS postdoctoral fellowships. We also thank an anonymous referee for valuable comments.

© European Southern Observatory (ESO) 2000

Online publication: June 30, 2000
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