The Physics of Cosmic Shocks: The NW Merger Shock and Radio Relic in Abell 3667

Details The Physics of Cosmic Shocks: The NW Merger Shock and Radio Relic in Abell 3667 The Physics of Cosmic Shocks: The NW Merger Shock and Radio Relic in Abell 3667

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009xmm..prop..113s&link_type=abstract

XMM-Newton Proposal ID #06530501

Physics

Groups Of Galaxies, Clusters Of Galaxies, Supercluster, Abell 3667 Nw S

Scientific paper

Abell 3667 is the archetype of a merging cluster with radio relics. The NW relic is the brightest cluster relic or halo known. This region was imaged with XMM in AO-7. We detected a X-ray brightness and hardness jump at the edge of the NW relic. This could be due to a merger shock, or to inverse Compton (IC) emission from the relic; both are consistent within the errors. We propose a long observation to determine the contributions of shock and IC emission. Comparison of the shock properties and the radio relic will be a critical test of the shock acceleration model for relics. The relic IC emission will give the magnetic field and cosmic ray energy of the relic. We will determine the efficiency of particle acceleration, and provide the first data on the physics of cosmic shock fronts.

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