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Observational Properties of Globular Clusters in Dwarf Galaxies

Published online by Cambridge University Press:  11 July 2011

M. Koleva ,
Ph. Prugniel ,
I. Vauglin ,
M.E. Sharina ,
R. Chandar ,
T.H. Puzia ,
P. Goudfrooij  and
E. Davoust
M.E. Sharina
Affiliation:
Special Astrophysical Observatory, Russian Academy of Sciences, N.Arkhyz, KChR, 369167, Russia Laboratoire d’Astrophysique de Toulouse-Tarbes, Université de Toulouse, CNRS, 14 avenue E. Belin, 31400 Toulouse, France
R. Chandar
Affiliation:
Department of Physics and Astronomy, The University of Toledo, 2801 West Bancroft Street, Toledo
T.H. Puzia
Affiliation:
Herzberg Institute of Astrophysics, 5071 West Saanich Road, Victoria, BC
P. Goudfrooij
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
E. Davoust
Affiliation:
Laboratoire d’Astrophysique de Toulouse-Tarbes, Université de Toulouse, CNRS, 14 avenue E. Belin, 31400, Toulouse, France
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Abstract

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 ∼109M⊙; 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.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 48: CRAL-2010 A Universe of Dwarf Galaxies , 2011 , pp. 237 - 241
Copyright
© EAS, EDP Sciences, 2011

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