Physics
Scientific paper
Jul 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000hst..prop.8644w&link_type=abstract
HST Proposal ID #8644
Physics
Hst Proposal Id #8644 Galaxies
Scientific paper
We propose to obtain deep WFPC2 B, V, and I images of two unusual, extended, low surface brightness plumes of material recently discovered in the Coma and Centaurus clusters. These plumes are most likely transient tidal debris resulting from the destruction of galaxies as they passed through the cores of these clusters. Over time, this debris will spread throughout the cluster potential, augmenting the intergalactic populations of stars, globular clusters, dwarf galaxies, and gas. Some of this material may also be incorporated into the halos of the central dominant galaxies. In these plumes we are witnessing the ongoing formation of the diffuse intracluster background of stellar light seen in many rich clusters, as well as the material from which cD galaxies themselves may be built. This is recycling on a cosmic scale. Determining the nature of this recycled material is key to understanding the formation and evolution of the intergalactic stellar population, as well as t he evolution of the galaxy populations in clusters. HST images of these two plumes will enable direct study of their stellar populations, specifically, the number of bright supergiants, globular clusters, and star forming regions which may be present.
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