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Evidence for An Intermediate-Age, Metal-rich Population of Globular Clusters in NGC 4365
S. S. Larsen, J. P. Brodie, M. A. Beasley +4
We present spectroscopy for globular clusters (GCs) in the elliptical galaxy NGC 4365, obtained with the LRIS spectrograph on the Keck I telescope. Previous studies have shown that…
Globular Clusters in Compact Groups
C. Da Rocha, C. Mendes de Oliveira, M. Bolte +2
We have studied globular cluster systems (GCSs) around elliptical galaxies in Hickson compact groups using multi-band deep, high quality images from Keck, VLT and CFHT. Analyzing t…
Relative Ages of Globular Clusters
Thomas H. Puzia
Ages of extragalactic globular clusters can provide valuable insights into the formation and evolution of galaxies. In this contribution the photometric methods of age dating old g…
Integrated Spectroscopy of Bulge Globular Clusters and Fields I. The Data Base and Comparison of Individual Lick Indices in Clusters and Bulge
Thomas H. Puzia, Roberto P. Saglia, Markus Kissler-Patig +4
We present a comprehensive spectroscopic study of the integrated light of metal-rich Galactic globular clusters and the stellar population in the Galactic bulge. We measure line in…
Integrated Spectroscopy of Bulge Globular Clusters and Fields. II. Implications for stellar population models and elliptical galaxies
C. Maraston, L. Greggio, A. Renzini +4
Synthetic Lick indices (e.g. Mg_2, Fe, etc.) of Simple Stellar Population (SSP) models are calibrated for the first time up to solar metallicity with a sample of Milky Way globular…
Extragalactic Globular Clusters in the Near-Infrared II. The Globular Clusters Systems of NGC 3115 and NGC 4365
Thomas H. Puzia, Stephen E. Zepf, Markus Kissler-Patig +3
We combine near-infrared photometry obtained with the VLT/ISAAC instrument and archival HST/WFPC2 optical images to determine VIK magnitudes and colours of globular clusters in two…