Model of electron pressure anisotropy in the electron diffusion region of collisionless magnetic reconnection

DOI PDF 被引用文献2件
  • A. Divin
    Katholieke Universiteit Leuven 1 Centrum voor Plasma-astrofysica, , B-3001 Heverlee, Belgium
  • S. Markidis
    Katholieke Universiteit Leuven 1 Centrum voor Plasma-astrofysica, , B-3001 Heverlee, Belgium
  • G. Lapenta
    Katholieke Universiteit Leuven 1 Centrum voor Plasma-astrofysica, , B-3001 Heverlee, Belgium
  • V. S. Semenov
    St. Petersburg State University 2 Department of Physics, , St. Petersburg 198504, Russia
  • N. V. Erkaev
    Russian Academy of Sciences 3 Institute for Computational Modelling, , Krasnoyarsk 660036, Russia and , Krasnoyarsk 660041, Russia
  • H. K. Biernat
    Austrian Academy of Sciences 4 Space Research Institute, , Graz A-8042, Austria and Institute of Physics, , Graz A-8010, Austria

書誌事項

公開日
2010-12-01
DOI
  • 10.1063/1.3521576
公開者
AIP Publishing

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説明

<jats:p>A new model of the electron pressure anisotropy in the electron diffusion region in collisionless magnetic reconnection is presented for the case of antiparallel configuration of magnetic fields. The plasma anisotropy is investigated as source of collisionless dissipation. By separating electrons in the vicinity of the neutral line into two broad classes of inflowing and accelerating populations, it is possible to derive a simple closure for the off-diagonal electron pressure component. The appearance of these two electron populations near the neutral line is responsible for the anisotropy and collisionless dissipation in the magnetic reconnection. Particle-in-cell simulations verify the proposed model, confirming first the presence of two particle populations and second the analytical results for the off-diagonal electron pressure component. Furthermore, test-particle calculations are performed to compare our approach with the model of electron pressure anisotropy in the inner electron diffusion region by Fujimoto and Sydora [Phys. Plasmas 16, 112309 (2009)].</jats:p>

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