The metal abundance of metal-rich globular clusters. II

Details The metal abundance of metal-rich globular clusters. II The metal abundance of metal-rich globular clusters. II

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...169..208g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 169, no. 1-2, Nov. 1986, p. 208-218.

Astronomy and Astrophysics

Astrophysics

77

Galactic Evolution, Globular Clusters, Metallicity, Abundance, Spectrum Analysis

Scientific paper

The metal abundance of five globular clusters (47 Tucanae, M5, M4, NGC 6752 and M71) has been derived from new high dispersion spectra obtained with the CASPEC spectrograph and compared with analogous material for α Bootis. A new metallicity scale for metal-rich globular clusters is proposed. On this scale, M71 and 47 Tuc have [Fe/H] = -0.8, while the M5 metallicity is at [Fe/H] = -1.4. This confirms the most recent attempts to derive a metallicity scale for metal-rich globular clusters. A brief review of the consequences of the presently proposed metallicity scale on age derivation and on the interpretation of the horizontal branch parameters is made.

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