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Liang, Edison; Boettcher, Markus; Smith, Ian
Astrophysical journal. Letters, 04/2013, Letnik: 766, Številka: 2Journal Article
Using particle-in-cell simulations, we study the kinetic physics of relativistic shear flow in collisionless electron-positron (e + e-) plasmas. We find efficient magnetic field generation and particle energization at the shear boundary, driven by streaming instabilities across the shear interface and sustained by the shear flow. Nonthermal, anisotropic high-energy particles are accelerated across field lines to produce a power-law tail turning over just below the shear Lorentz factor. These results have important implications for the dissipation and radiation of jets in blazars and gamma-ray bursts.
