CRITICAL DIFFERENCES OF ASYMMETRIC MAGNETIC RECONNECTION FROM STANDARD MODELS
CRITICAL DIFFERENCES OF ASYMMETRIC MAGNETIC RECONNECTION FROM STANDARD MODELS
复制标题
不对称磁重联与标准模型的关键区别
DOI:
10.3847/0004-637x/828/1/63
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
K. Kondoh
中科院分区:
文献类型:
--
作者:
S. Nitta;T. Wada;T. Fuchida;K. Kondoh
We have clarified the structure of asymmetric magnetic reconnection in detail as the result of the spontaneous evolutionary process. The asymmetry is imposed as ratio k of the magnetic field strength in both sides of the initial current sheet (CS) in the isothermal equilibrium. The MHD simulation is carried out by the HLLD code for the long-term temporal evolution with very high spatial resolution. The resultant structure is drastically different from the symmetric case (e.g., the Petschek model) even for slight asymmetry k = 2. (1) The velocity distribution in the reconnection jet clearly shows a two-layered structure, i.e., the high-speed sub-layer in which the flow is almost field aligned and the acceleration sub-layer. (2) Higher beta side (HBS) plasma is caught in a lower beta side plasmoid. This suggests a new plasma mixing process in the reconnection events. (3) A new large strong fast shock in front of the plasmoid forms in the HBS. This can be a new particle acceleration site in the reconnection system. These critical properties that have not been reported in previous works suggest that we contribute to a better and more detailed knowledge of the reconnection of the standard model for the symmetric magnetic reconnection system.
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影响因子:
2.2
作者:
S. Zenitani;T. Miyoshi
通讯作者:
S. Zenitani;T. Miyoshi
影响因子:
4.1
作者:
Miyoshi, T;Kusano, K
通讯作者:
Kusano, K
影响因子:
7.9
作者:
Isobe, H.;Proctor, M. R. E.;Weiss, N. O.
通讯作者:
Weiss, N. O.
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
Norita Kawanaka;Ryoji Kawabata;川中宣太;政田洋平;Norita Kawanaka;Norita Kawanaka
通讯作者:
Norita Kawanaka