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arXiv 1306.2705astro-ph.SRphysics.plasm-phphysics.space-ph
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重联流出排气中离子流层的动力学方面

Kinetic aspects of the ion current layer in a reconnection outflow exhaust

Seiji Zenitani, Iku Shinohara, Tsugunobu Nagai, Tomohide Wada

摘要:

用二维粒子模拟方法研究了X型区域附近重联外流排气中心离子流层的动力学特性。该层由携带垂直电流的磁化电子和未磁化离子组成。离子流体似乎是非理想的,亚Alfvenic,和非耗散。离子速度分布函数包含多个种群,如全球Speiser离子,本地Speiser离子,和捕获的离子。局部Speiser离子在适当旋转的坐标系中的粒子运动很好地解释了离子流体的性质。被捕获的离子是混沌粒子动力学中规则轨道的第一个证明[Chen和Palmadesso,J. Geophys.结果:91,1499(1986)]在自洽PIC模拟中。它们将是重联点附近离子流层的观测特征。

英文摘要:

Kinetic aspects of the ion current layer at the center of a reconnection outflow exhaust near the X-type region are investigated by a two-dimensional particle-in-cell (PIC) simulation. The layer consists of magnetized electrons and unmagnetized ions that carry a perpendicular electric current. The ion fluid appears to be nonideal, sub-Alfvenic, and nondissipative. The ion velocity distribution functions contain multiple populations such as global Speiser ions, local Speiser ions, and trapped ions. The particle motion of the local Speiser ions in an appropriately rotated coordinate system explains the ion fluid properties very well. The trapped ions are the first demonstration of the regular orbits in the chaotic particle dynamics [Chen and Palmadesso, J. Geophys. Res., 91, 1499 (1986)] in self-consistent PIC simulations. They would be observational signatures in the ion current layer near reconnection sites.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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