Young Globular Clusters in Interacting and Cooling Flow Galaxies

Physics

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Hst Proposal Id #6228 Galaxies And Cluster

Scientific paper

Observing sites of young globular cluster formation may provide important insights into formation mechanisms. Young clusters were observed in NGC 1275 by WFPC1. A critical question raised by these observations was whether cluster formation was linked to a previous interaction or to the cooling flow around NGC 1275. It is plausible that these two different scenarios would lead to different cluster formation histories, with an interaction causing a burst of cluster formation and a cooling flow causing formation to be extended in time. We intend to distinguish between these histories by deep imaging of the cluster population around NGC 1275. In addition, we are obtaining observations of two additional cooling flow galaxies. In these, we will look for the presence of young clusters. Also, we will investigate our hypothesis that cooling flow galaxies with blue central regions are sites of a recent interaction.

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