The extremely metal-poor globular cluster M30 (NGC 7099)

Details The extremely metal-poor globular cluster M30 (NGC 7099) The extremely metal-poor globular cluster M30 (NGC 7099)

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...199l...1c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 199, no. 1-2, June 1988, p. L1-L4. CONICET-supported research.

Astronomy and Astrophysics

Astrophysics

5

Abundance, Color-Magnitude Diagram, Galactic Clusters, Globular Clusters, Metallicity, Red Giant Stars, Astronomical Photometry, Charge Coupled Devices, Cyanides, Interstellar Extinction

Scientific paper

Abundances 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.

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