Study of Candidate 'Fossil Groups'

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Chandra Proposal Id #05800007

Scientific paper

We propose observations of six candidate "fossil" groups. This set represents the brighter members of the "fossil" groups selected from the catalog of Beuing et al., derived from the RASS. The groups selected are those that contain no other nearby bright galaxies and hence are candidates for having anomalously high mass-to-light ratios as found from a study of several other members of this class. We propose to derive mass-to-light ratios to test the universality of M/L. In addition, these groups are "old" and hence their gaseous atmospheres are relatively undisturbed. They make ideal laboratories for exploring the effects of thermal conduction and energy input by relativistic plasma generated by the black hole in the central dominant galaxy.

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