Dissipation of Nonlinear Alfven Waves with Current Sheets in Relativistic Plasmas

Details Dissipation of Nonlinear Alfven Waves with Current Sheets in Relativistic Plasmas Dissipation of Nonlinear Alfven Waves with Current Sheets in Relativistic Plasmas

2009-02-27

arxiv.org/abs/0902.4740v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

13 pages. 16 figures

Scientific paper

We present results from 2.5-dimensional Particle-in-Cell simulations of the interaction of nonlinear Alfven waves with thin current sheets in relativistic plasmas. We find that the Alfven waves cause the current sheet to bend and kink and increase its dissipation. The electrons are eventually heated to form a double Maxwellian, with the hotter Maxwellian caused by the current sheet dissipation and cooler Maxwellian caused by the Alfven turbulence cascade. These results may have important implications for the kinetic dissipation of MHD turbulence in which both nonlinear Alfven waves and current sheets are present, such as turbulence in accretion flows driven by the saturated magnetorotational instability (MRI).

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