The Connection Between Radio Mini-Halos and Core Gas Sloshing

Details The Connection Between Radio Mini-Halos and Core Gas Sloshing The Connection Between Radio Mini-Halos and Core Gas Sloshing

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21840825z&link_type=abstract

American Astronomical Society, AAS Meeting #218, #408.25; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

Radio mini-halos are diffuse, steep-spectrum synchrotron sources associated with a fraction of relaxed clusters of galaxies. Observations of some mini-halo sources indicate a correlation between the radio emission and the X-ray signature of gas sloshing, ``cold fronts.'' Some authors have suggested turbulence associated with the sloshing motions may reaccelerate relativistic electrons, resulting in emission associated with the fronts. We present MHD simulations of core gas sloshing in a galaxy cluster, where we measure the turbulence created by these motions and employ passive tracer particles to act as relativistic electrons that may be reaccelerated by such turbulence. Our results support such a link between sloshing motions and particle reacceleration.

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