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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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Self-organization in space plasma: formation of magnetic shear in current sheetsтезисы доклада
- Авторы: Lev Zelenyi, Helmi Malova, Oleg Mingalev, Elena Grigorenko, Victor Popov, Dominique Delcourt, Anatoli Petrukovich
- Сборник: 41st COSPAR Scientific Assembly 2016, Istambul, Turkey, 30 July-7
- Тезисы
- Год издания: 2016
- Место издания: COSPAR Turkey, Istanbul
- Первая страница: D2.4-0018-16.
- Аннотация: Thin current sheets are plasma structures that usually appear near reconnection regions. The presence of the shear magnetic field is characteristic for these structures. Self-consistent ki- netic model of magnetotail thin current sheet (TCS) is used to understand the mechanisms of self-organization of sheared thin current sheets in a space plasma. It is shown that these config- urations appear as a result of self-consistent evolution of some initial magnetic perturbation at current sheet center. Two general shapes of shear TCS components are found as a function of the transverse coordinate: symmetric and antisymmetric. We show that TCS formation goes together with the emergence of field-aligned currents in the center of the current sheet, as a result of north-south asymmetry of quasi-adiabatic ion motions. Ion drift currents can also contribute to the magnetic shear evolution, but their role is much less significant, their contri- bution depending upon the normal component Bz and the amplitude of the initial perturbation in TCS. Parametric maps illustrating different types of TCS equilibria are presented.
- Добавил в систему: Малова Хельми Витальевна