Program: GS-2004B-Q-33

Title:The Ages, Metallicities, and Velocities of Globular Clusters in Dwarf Elliptical Galaxies
PI:Bryan Miller
Co-I(s): MIchael Hilker, Markus Kissler-Patig, Jennifer Lotz, Thomas Puzia

Abstract

We propose to continue a project to obtain GMOS spectra of globular clusters and nuclei in dwarf elliptical galaxies with the aim of measuring radial velocities and line indices. This proposal focuses on FCC136, the galaxy with the richest cluster system in our survey of Fornax dEs. Radial velocities of the globulars will provide rough estimates of the velocity dispersions of the globular cluster systems that will help constrain the dark matter distribution in the dwarf galaxies. This will complement deep long-slit spectra already obtained of the nucleus and central region. In addition, we will use the spectra to break the metallicity/age degeneracy in our broad-band photometry to determine the relative ages and metallicities of the nuclei and globular clusters. These results are needed to distinguish various theories of dwarf elliptical galaxy formation. This proposal seeks to complete the observations of FCC136 begun in 2003B. Nine of twenty-two hours were observed and we ask to complete the remaining thirteen.