Are gamma-ray burst shocks mediated by the weibel instability?

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Abstract

It is estimated that the Weibel instability is not generally an effective mechanism for generating ultrarelativistic astrophysical shocks. Even if the upstream magnetic field is as low as in the interstellar medium, the shock is mediated not by the Weibel instability but by the Larmor rotation of protons in the background magnetic field. Future simulations should be able to verify or falsify our conclusion.

Original languageEnglish
Pages (from-to)1250-1254
Number of pages5
JournalAstrophysical Journal
Volume647
Issue number2 I
DOIs
StatePublished - 20 Aug 2006

Keywords

  • Gamma rays: Bursts
  • Instabilities
  • Magnetic fields
  • Plasmas
  • Shock waves

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