Testing the Origin and Evolution of Fossil Groups of Galaxies with XMM-Newton

Details Testing the Origin and Evolution of Fossil Groups of Galaxies with XMM-Newton Testing the Origin and Evolution of Fossil Groups of Galaxies with XMM-Newton

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009xmm..prop..123d&link_type=abstract

XMM-Newton Proposal ID #06534507

Physics

Groups Of Galaxies, Clusters Of Galaxies, Supercluster, Eso 351-021, Rx J1007+3800, Rx J1410+4145, Rx J1331.5+1108, Rx J0856+0553, Rx J1045+0420, Rx J1136+0713

Scientific paper

Fossil groups (FGs) present a puzzle to current theories of structure formation. Despite the low number of bright galaxies, their high sigma and high gas T_X indicate cluster-like potential wells. The measured c200 seem are high indicating early formation epochs, in contradiction with the observed lack of large cool cores. There are few FGs with deep X-ray data to date, and their idiosyncratic characteristics may contribute to enhance these apparent contradictions. To zero in on their origin and formation mechanisms it is fundamental to increase the number of FGs with good quality X-ray data. Here, we propose to build the 1st large X-ray sample of bona-fide FGs. True diffuse emission has been verified through 2 Chandra programs. This will allow us to significantly constrain FG's formation mechanisms.

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