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Title: MAGNETIC FIELD GENERATION AND PARTICLE ENERGIZATION AT RELATIVISTIC SHEAR BOUNDARIES IN COLLISIONLESS ELECTRON-POSITRON PLASMAS

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.
Authors:
;  [1] ;  [2]
  1. Rice University, MS 108, 6100 Main Street, Houston, TX 77005 (United States)
  2. Physics and Astronomy Department, Ohio University, Athens, OH 45701 (United States)
Publication Date:
OSTI Identifier:
22130780
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 766; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANISOTROPY; COSMIC GAMMA BURSTS; ELECTRONS; GALAXIES; INSTABILITY; INTERFACES; MAGNETIC FIELDS; PLASMA; POSITRONS; RELATIVISTIC RANGE; SIMULATION