XMM-Newton Proposal 02061802

Details XMM-Newton Proposal 02061802 XMM-Newton Proposal 02061802

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003xmm..prop..320r&link_type=abstract

XMM-Newton Proposal ID #02061802

Physics

A1056, Warpj1325.2+6550, Xmm-Newton Proposal 02061802

Scientific paper

Galaxy groups probably contain most of the baryons in the Universe. Unfortunately the low X-ray surface brightness of groups has prevented the detection of the gas at large radii which should dominate their baryon content. We propose, for the first time, to trace the surface brightness of a few groups out to close to R_200. This will allow us to measure total gas and iron masses, baryon fractions, and mass/light, gas/star, and iron-mass/light ratios, and to investigate the differences from rich clusters. Coupled with results from existing XMM data, this will provide template profiles for extrapolating the properties of groups to large radii, test formation scenarios for groups, and test whether clusters can be formed by the merger of galaxy groups.

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