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Abstract: We study relativistic unmagnetized collisionless shocks using unprecedentedlylarge particle-in-cell simulations of two-dimensional pair plasma. High energyparticles accelerated by the shock are found to drive magnetic field evolutionon a timescale >10^4 plasma times. Progressively stronger magnetic fields aregenerated on larger scales in a growing region around the shock.Shock-generated magnetic fields and accelerated particles carry >1% and >10% ofthe downstream energy flux, respectively. Our results suggest limits on themagnetization of relativistic astrophysical flows.



Author: Uri Keshet, Boaz Katz, Anatoly Spitkovsky, Eli Waxman

Source: https://arxiv.org/







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