GMOS Spectroscopy of Globular Clusters in Virgo and Fornax dEs

Details GMOS Spectroscopy of Globular Clusters in Virgo and Fornax dEs GMOS Spectroscopy of Globular Clusters in Virgo and Fornax dEs

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.8010m&link_type=abstract

American Astronomical Society Meeting 204, #80.10; Bulletin of the American Astronomical Society, Vol. 36, p.812

Astronomy and Astrophysics

Astronomy

Scientific paper

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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