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Astron. Astrophys. 348, 524-532 (1999)

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We thank Mel Dyck for sending us his photometry of giants and Boris Gänsicke, Frederick Hessman, and Klaus Reinsch for many discussions and the referee H. Schild for helpful comments. This research has made use of the on-line version of the HIPPARCOS catalogue. IB thanks the Universitäts-Sternwarte, Göttingen, for hospitality and the APAPE (PROCOPE contract 97151) for travel support. The work of PH was supported in part by NASA ATP grant NAG 5-3018, LTSA grant NAG 5-3619 and NSF grant AST-9720804 to the University of Georgia. Some of the calculations presented in this paper were performed on the IBM SP2 and SGI Origin 2000 of the UGA UCNS, at the San Diego Supercomputer Center (SDSC) and at the National Center for Supercomputing Applications (NCSA), with support from the National Science Foundation, and at the NERSC with support from the DoE. We thank all these institutions for a generous allocation of computer time.

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© European Southern Observatory (ESO) 1999

Online publication: July 26, 1999