Testing the Connection Between Radio Mini-Halos and Core Gas Sloshing with MHD Simulations

Details Testing the Connection Between Radio Mini-Halos and Core Gas Sloshing with MHD Simulations Testing the Connection Between Radio Mini-Halos and Core Gas Sloshing with MHD Simulations

2011-01-24

arxiv.org/abs/1101.4627v2

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

4 pages, 3 figures. Proceedings of the conference "Non-thermal phenomena in colliding galaxy clusters" (Nice, 15-18 November 2

Scientific paper

Radio mini-halos are diffuse, steep-spectrum synchrotron sources associated with 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 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 accelerated by such turbulence. Our preliminary results support such a link between sloshing motions and particle reacceleration.

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