The Extremely Metal-Poor Globular Cluster M30 (NGC 7099)

CLARIA, J. J., MINNITI, D., GOMEZ, M.

EDP SCIENCES S A

Lugar: Paris; Año: 1988 p. 1 - 1

bundances for a sample of red giants in the Galactic globular cluster M30 = NGC 7099 have been determined from intermediate-band DDO photometry. The metallicity estimated, (Fe/H) = -2.4 or less, places M30 as the most metal-deficient globular cluster presently known, thus extending the abundance scale of the ranking method of Hesser et al. (1977). No CH-strength variations exist among the cluster giants. The morphology of Bolte´s (1987) CCD color-magnitude diagram supports the present abundance results.