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B. Miller (Gemini), J. Lotz (UCSC), M. Hilker (Bonn), M. Kissler-Patig (ESO), T. Puzia, M. Stiavelli (STScI)
We present preliminary results of a program to obtain ages, metallicities, and radial velocities of globular clusters (GCs) in dwarf elliptical galaxies and the Virgo and Fornax clusters using the GMOS instruments on the Gemini telescopes. Photometry of GCs in a large sample of dEs (Lotz et al. 2004) suggest that the globulars are old and metal-poor, like Milky Way globulars. However, the age-metallicity degeneracy in broad-band colors makes it difficult to distinguish old and intermediate-age stellar populations. We have now obtained spectra of GCs in four galaxies in the Virgo and Fornax clusters using GMOS-N and GMOS-S in order to derive ages and metallicities via line indices. Radial velocities will verify that the objects are GCs and may provide some kinematic information.
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Bulletin of the American Astronomical Society, 36 #2
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