to IAU
Symposium 241
Symposium 241
Abstract details
Science with a Library of Integrated Spectra of Galactic Globular Clusters
Ricardo P. Schiavon, James A. Rose, Stephane Courteau, Lauren A. MacArthurAbstract
We present a condensed guide to an unparalleled, publicly available,
library of high S/N integrated spectra of 40 Galactic globular clusters
obtained with the CTIO 4-m telescope. The spectra cover the range
3350-6430 Ang with ~3.1 Ang (FWHM) resolution and integrate the full
projected area within a cluster core radius thus sampling the light from
stars in all relevant evolutionary stages. The total sample is fairly
representative of the entire Galactic globular cluster population spanning
a wide range of cluster parameters, such as metallicity, horizontal-branch
morphology, Galactic location, Galactocentric distance, and concentration.
We discuss applications of this unique data base such as the comparison
with similar integrated spectra of unresolved stellar populations in
remote systems and the coupling with deep color-magnitude diagrams and
reliable metal abundances from the literature to enable the calibration
of stellar population synthesis models.