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Hempel, Maren (2004): Early-Type Galaxies And Their Sometimes Not So Old Globular Clusters. Dissertation, LMU München: Fakultät für Physik



The work presented here deals with the age structure in globular cluster systems of early-type galaxies and aims at further clues about the formation and evolution of these galaxies. Hereby we turn our attention mainly to the detection of age sub-populations within the globular cluster systems, which are a clear signature of multiple star formation events and describe the major phases in the evolutionary history of the host galaxy. The basic ingredients to our semi-numerical approach are combined optical and near-infrared observations of various globular cluster systems and Single Stellar Population models. Besides the introduction and the test of our semi-numerical method of deriving the age structure in globular cluster systems we are also interested in investigating an extended galaxy sample, i.e. their globular cluster systems in order to find systematic dependencies of the age structure. Since Single Stellar Population models are crucial for our project and various of these models are available we also to evcaluate the influence of our choice of SSP model on the final result.