The Dynamics of the Unusually Violent Merger in Abell 2744

Details The Dynamics of the Unusually Violent Merger in Abell 2744 The Dynamics of the Unusually Violent Merger in Abell 2744

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cxo..prop.2230k&link_type=abstract

Chandra Proposal ID #08800638

Physics

Chandra Proposal Id #08800638

Scientific paper

We propose to observe A2744, a z=0.31 cluster undergoing an unusually violent merger, one of only a few with Mach number >2. The cluster hosts one of the most luminous known radio halos, powered by relativistic electrons accelerated in the merger. Combined with our recently obtained radio data and proposed optical spectroscopy of cluster galaxies, Chandra will allow us to put extremely tight constraints on the dynamical state of the cluster. We will measure the merger velocity using the subclusters' cool cores and the temperature enhancement in shocked gas, and will determine the dynamical state of the small infalling subcluster to the NW. Finally, we will determine the acceleration mechanism of the radio-emitting electrons using correlations between radio brightness and gas temperature.

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