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.