Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-03-16
Astronomy and Astrophysics
Astrophysics
Proceedings from 1st NBSI on "Beams and Jets in Gamma Ray Bursts", held at NBIfAFG/NORDITA, Copenhagen, Denmark, August, 2002
Scientific paper
We present numerical results from plasma particle simulations of collisionless shocks and ultra-relativistic counter-streaming plasmas. We demonstrate how the field-particle interactions lead to particle acceleration behind the shock-front. Further, we demonstrate how ultra relativistic counter-streaming plasmas create large scale patchy magnetic field structures and that these field structures propagate down-stream of the shock front. These results may help explain the origin of the magnetic fields and accelerated electrons responsible for afterglow synchrotron radiation from gamma ray bursts.
Frederiksen Jacob Trier
Haugboelle Troels
Hededal Christian Busk
Nordlund Aake
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