Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..91...99b&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 91, no. 1, March 1983, p. 99-123. Research supported by the Conselho Nacio
Astronomy and Astrophysics
Astrophysics
107
Astronomical Photometry, Chemical Evolution, Galactic Evolution, Globular Clusters, Metallicity, Milky Way Galaxy, Abundance, Astronomical Models, Frequency Distribution, Hydrogen, Interstellar Extinction, Iron, Spatial Distribution, Stellar Evolution, Ubv Spectra
Scientific paper
Integrated photometry of 91 galactic globular clusters was carried out with the UBV and DDO systems. A method to determine reddening is presented. Metal abundances were obtained by means of a calibration of C(42-45)0 vs [Fe/H]. Thirteen other clusters whose metallicity values were made compatible with those observed here, were added to the sample totalizing a homogeneous set of [Fe/H] estimates for 104 globular clusters. This sample is used to analyze the spatial distribution of metallicities. An estimate of the intrinsic metal abundance frequency distribution of the globular cluster system is provided. The chemical properties of the globular cluster system are compared with one-zone-chemical-enrichment models which take into account gas loss from star formation regions. It is concluded that these models cannot describe the complete chemical enrichment of the globular cluster system.
Bica Eduardo L. D.
Pastoriza Miriani Griselda
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