ar X iv : a st ro - p h / 98 08 06 7 v 1 7 A ug 1 99 8 OSSERVATORIO ASTRONOMICO di PADOVA

Abstract

The photometric estimate of the metallicity and the age of the Azzopardi et al. (1991) carbon stars (Ng 1997) is revised to respectively Z≃0.004 and ∼0.1 Gyr. Under the hypothesis that the carbon stars are located at a distance related to the Sagittarius dwarf galaxy, the broad velocity dispersion of the stars can only be explained if they were formed out… (More)

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