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À propos de : Observational Properties of Globular Clusters in Dwarf Galaxies        

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  • Observational Properties of Globular Clusters in Dwarf Galaxies
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  • We analyse evolutionary parameters of globular clusters in dwarf galaxies obtained in our medium-resolution spectroscopic observations, and their connection with the properties of the host galaxies. We find that 1) the metallicity spread in globular cluster systems is wider for larger galaxies; 2) metal-rich clusters are young and preferentially found in galaxies more massive than ∼10 9M⊙; 3) intermediate-age globular clusters in early-type dwarf galaxies are richer in metals than star clusters representing dynamically cold gas-rich environments in dwarf irregulars; 4) the age-metallicity relation is special for each galaxy, and depends not only on its mass, but also on some other factors, probably environmental conditions.
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  • eas1148053
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  • © EAS, EDP Sciences, 2011
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  • EAS, EDP Sciences
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