Particle-in-Cell Simulations of Relativistic Shear Flow Boundary Layer

Details Particle-in-Cell Simulations of Relativistic Shear Flow Boundary Layer Particle-in-Cell Simulations of Relativistic Shear Flow Boundary Layer

2011-11-14

arxiv.org/abs/1111.3326v2

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

17 pages 11 figures

Scientific paper

Using 2.5-dimensional Particle-in-Cell simulations, we study the kinetic physics of relativistic shear flows in e+e- plasmas. We find efficient magnetic field generation and nonthermal particle acceleration at the shear boundary. Ordered flux tubes/sheets transverse to the shear flow, with alternating polarities and peak fields reaching equipartition values, are generated and sustained by the free-energy of the shear flow. Nonthermal anisotropic high-energy particles are accelerated by diffusive acceleration. A quasi-power-law tail truncated at low energies is achieved at strong shears. These results have important implications for the dissipation and radiation of relativistic jets in blazars and gamma-ray bursts.

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