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Electron surfing acceleration in oblique magnetic fields
Linköping University, Department of Science and Technology, Visual Information Technology and Applications (VITA). Linköping University, The Institute of Technology.ORCID iD: 0000-0003-4055-0552
Institute of Theoretical Physics IV Ruhr-University Bochum, Germany.
Institute of Theoretical Physics IV Ruhr-University Bochum, Germany.
Institute of Theoretical Physics IV Ruhr-University Bochum, Germany.
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2006 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 367, no 3, 865-872 p.Article in journal (Refereed) Published
Abstract [en]

Initially, inhomogeneous plasma jets, ejected by active galactic nuclei and associated with gamma-ray bursts, are thermalized by the formation of internal shocks. Jet subpopulations can hereby collide at Lorentz factors of a few. As the resulting relativistic shock expands into the upstream plasma, a significant fraction of the upstream ions is reflected. These ions, together with downstream ions that leak through the shock, form relativistic beams of ions that outrun the shock. The thermalization of these beams via the two-stream instability is thought to contribute significantly to plasma heating and particle acceleration by the shock. Here, the capability of a two-stream instability to generate relativistic field-aligned and cross-field electron flow, is examined for a magnetized plasma by means of a particle-in-cell (PIC) simulation. The electrons interact with the developing quasi-electrostatic waves and oblique magnetic fields. The simulation results bring forward evidence that such waves, by their non-linear interactions with the plasma, produce a highly relativistic field-aligned electron flow and electron energies, which could contribute to the radio synchrotron emissions from astrophysical jets, to ultrarelativistic leptonic subpopulations propagating with the jet and to the halo particles surrounding the accretion disc of the black hole.

Place, publisher, year, edition, pages
2006. Vol. 367, no 3, 865-872 p.
Keyword [en]
plasma physics
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-35695DOI: 10.1111/j.1365-2966.2005.09991.xLocal ID: 28187OAI: oai:DiVA.org:liu-35695DiVA: diva2:256543
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2017-12-13

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Dieckmann, Mark EYnnerman, Anders

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  • apa
  • harvard1
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  • de-DE
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