A 2.5-D electron Hall-MHD analytical model of steady state Hall magnetic reconnection in a compressible plasma

Тип публикации: статья из журнала

Год издания: 2011

Идентификатор DOI: 10.1029/2010JA015942

Аннотация: A 2.5-D analytical electron Hall magnetohydrodynamic model of steady state magnetic reconnection in a collisionless compressible plasma with a constant electron temperature is developed. It is shown that as in the incompressible case, the solution of the Grad-Shafranov equation for the magnetic potential is a basis for the problem analysis. The formation of the double electric layers and layers of low-density plasma, mapping the magnetic separatrices, are investigated. It is found that the formation of depletion layers should not be governed by the out-of-plane magnetic field, but rather, the origin of these layers lies inside the electron diffusion region. The double electric layers are found to be thin separatrices-elongated sheets, whose cross sections are of the order of the electron diffusion region half width. These charged layers provide the presence of the strong electric field orthogonal to the in-plane projection of the magnetic field, which forces electrons to accelerate into the out-of-plane direction. Outside of the double electric layers, the condition of quasi-neutrality of the plasma is found to be fulfilled to high accuracy.

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Издание

Журнал: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS

Выпуск журнала: Vol. 116

ISSN журнала: 21699380

Место издания: WASHINGTON

Издатель: AMER GEOPHYSICAL UNION

Авторы

  • Korovinskiy D.B. (Austrian Acad Sci, Space Res Inst, A-8042 Graz, Austria)
  • Semenov V.S. (St Petersburg State Univ, Inst Phys, St Petersburg 198504, Russia)
  • Erkaev N.V. (Russian Acad Sci, Inst Computat Modeling, Siberian Branch, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Polytech Inst, Krasnoyarsk, Russia)
  • Divin A.V. (Katholieke Univ Leuven, Dept Wiskunde, CPA, B-3001 Louvain, Belgium)
  • Biernat H.K. (Austrian Acad Sci, Space Res Inst, A-8042 Graz, Austria; Graz Univ, Inst Phys, Graz, Austria)
  • Moestl U.V. (Austrian Acad Sci, Space Res Inst, A-8042 Graz, Austria)

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