Regensburg 2007 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 10: Poster
EP 10.24: Poster
Mittwoch, 28. März 2007, 18:00–20:00, H46
Interaction of a dense electron-positron jet with a a dilute galactic plasma — •Nina Elkina1,2 and Jörg Büchner1 — 1Max-Planck-Institut für Sonnensystemforschung, Max-Planck-Str. 2, 37191 Katlenburg-Lindau, Germany — 2M.V. Keldysh Institute for Applied Mathematics Miusskaya sq., 4 Moscow 125047, Russia
We studied the interaction of a dense mildly-relativistic (gamma=3-10) electron-positron jet with the dilute ambient galactic electron-proton plasma and subsequent formation of large amplitude coherent structures. To calculate the nonlinear saturation and the amplitude of the unstable plasma waves we used a relativistic Vlasov code. We utilized open boundary conditions and free injection to study the processes at the jet- plasma interface and behind. We found that localized wave-packets are formed which grow and cause, after wave-breaking, shock waves. Quasi-stationary waves behind the jet front trap the majority of plasma particles. This leads to a significant plasma heating and beam particle acceleration. The obtained results apply to the description of the coherent part of the gamma-ray emission from galactic jets and to particles acceleration to high energies in general.