IGM in galaxy groups with dominant elliptical galaxy; optically selected fossils

Details IGM in galaxy groups with dominant elliptical galaxy; optically selected fossils IGM in galaxy groups with dominant elliptical galaxy; optically selected fossils

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cxo..prop.2227k&link_type=abstract

Chandra Proposal ID #08800424

Computer Science

Chandra Proposal Id #08800424

Scientific paper

We propose to observe a well-defined sample of 6 redshift-selected local galaxy groups, selected from 2dfGRS; each dominated by a single giant elliptical galaxy. The observation will enable us to test the hypothesis that most of the galaxy merging which builds up giant ellipticals actually takes place in collapsed groups. If this hypothesis is true, then we expect the great majority of purely optically selected fossil groups to show group-scale X-ray emission. In addition this study will significantly increase the number of known fossil groups - which show remarkable differences in their IGM and dark matter properties compared to non-fossil groups and cluster - and establish an economic and efficient method for finding further systems.

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