Shock Front in A521 and New Method of Measuring Intracluster Magnetic Field

Details Shock Front in A521 and New Method of Measuring Intracluster Magnetic Field Shock Front in A521 and New Method of Measuring Intracluster Magnetic Field

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop..101m&link_type=abstract

XMM-Newton Proposal ID #06038901

Other

Groups Of Galaxies, Clusters Of Galaxies, Supercluster, A521_Edge

Scientific paper

Shock fronts provide a unique tool to study the cluster plasma. So far only two unambiguous examples have been discovered, those in 1E0657 and A520. We propose to confirm and quantify another candidate, an X-ray brightness edge detected in a short Chandra observation of A521 at the location of a prominent radio relic. Owing to its geometry and the excellent multifrequency radio data on the relic, this shock front will enable a novel measurement of the intracluster magnetic field, based on the width of the radio relic and the gas velocities determined from the X-ray data. The proposed observation will unambiguously confirm the existence of the brightness edge and the fact that this is a shock front, and determine its Mach number.

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