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Astron. Astrophys. 321, 379-388 (1997)

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P.D. acknowledge support through a grant from the Swiss National Science Foundation. P.D. warmly thanks Graeme Smith for providing free use of his workstation during a postdoctoral stay at the Lick Observatory.

Note added in proof: As this paper was beeing accepted for publication, we became aware of a similar work by Djorgovski et al. (ApJL, in press). They derive velocity dispersions from Keck observations for a sample of 21 M 31 globular clusters, which includes our 9 clusters. Their results are in good agreement with ours, e.g., the difference in velocity dispersion values is always [FORMULA] 1.4 km s-1 for all clusters. They point out an interesting trend between the ratio mass-to-luminosity in the K band and the cluster metallicity, which has not been observed before.

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© European Southern Observatory (ESO) 1997

Online publication: June 30, 1998