The X-Ray Structure of Old, High Luminosity Fossil Galaxy Groups

Details The X-Ray Structure of Old, High Luminosity Fossil Galaxy Groups The X-Ray Structure of Old, High Luminosity Fossil Galaxy Groups

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..991j&link_type=abstract

Chandra Proposal ID #03800443

Computer Science

Chandra Proposal Id #03800443

Scientific paper

A class of `fossil' groups has been discovered. Most L* galaxies in these groups have merged into a normal, relaxed, giant elliptical galaxy. Fossil groups thus appear to be very old. They represent an end-point of galaxy merging and may be the evolutionary link between compact groups and giant elliptical galaxies. We propose an ACIS study of these old groups to (a) study the environment of giant elliptical formation and (b) to understand their high X-ray luminosities (Lx). Their properties have important implications for the impact of preheating at early epochs and the merger origin of giant ellipticals. Here we propose to study a sample of high Lx systems: accompanying proposals are for a single high Lx system (PI Jones), and nearby low Lx systems (PI Ponman).

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