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GMOS Spectroscopy of Globular Clusters in Dwarf Elliptical Galaxies

Published online by Cambridge University Press:  01 September 2007

Bryan W. Miller ,
Jennifer Lotz ,
Michael Hilker ,
Markus Kissler-Patig  and
Thomas Puzia
Bryan W. Miller
Affiliation:
Gemini Observatory, Casilla 603, La Serena, Chile email: bmiller@gemini.edu
Jennifer Lotz
Affiliation:
National Optical Astronomy Observatory, 950 N. Cherry Ave., Tucson, AZ 85719, USA email: lotz@noao.edu
Michael Hilker
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Str.2 85748 Garching, Germany email: mhilker@eso.org, mkissler@eso.org
Markus Kissler-Patig
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Str.2 85748 Garching, Germany email: mhilker@eso.org, mkissler@eso.org
Thomas Puzia
Affiliation:
Herzberg Institute of Astrophysics, 5071 West Saanich Road, Victoria, BC V9E 2E7, Canada email: thomas.puzia@nrc.ca
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Abstract

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We present a Gemini/GMOS program to measure spectroscopic metallicities and ages of globular clusters (GCs) and nuclei in dwarf elliptical galaxies in the Virgo and Fornax Clusters. Preliminary results indicate that the globular clusters are old and metal-poor, very similar to the GCs in the Milky Way halo. The nuclei tend to be more metal-rich than the globular clusters but more metal-poor and older, on average, than the stars in the bodies of the galaxies. The [α/Fe] ratio appears to be solar for the GCs, nuclei, and dEs, but the uncertainties do not exclude some globular clusters from being enhanced in alpha elements.

Keywords

galaxies: star clustersgalaxies: dwarfgalaxies: nuclei
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S246: Dynamical Evolution of Dense Stellar Systems , September 2007 , pp. 429 - 430
Copyright
Copyright © International Astronomical Union 2008

References

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Miller, B. W. & Lotz, J. M. 2007, ApJ, in press (astro-ph/0708.2511)Google Scholar
Thomas, D., et al. MNRAS, 339, 897CrossRefGoogle Scholar