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Astron. Astrophys. 322, 807-816 (1997) AcknowledgementsWe would like to thank Dr. M. Politano who made his population calculations available in a machine-readable form. MPD thanks for the hospitality at the Astrononomisches Institut Münster during his stay there and for the financial support of DAAD/CAPES (grant No. 415-WA-BR). AB is grateful for the hospitality found at the LNA/CNPq. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1997 Online publication: June 5, 1998 ![]() |