Bibliographic Details
| Title: |
CRITICAL DIFFERENCES OF ASYMMETRIC MAGNETIC RECONNECTION FROM STANDARD MODELS. |
| Authors: |
S. Nitta1,2,3,4 nittasn@yahoo.co.jp, T. Wada2 tomohide.wada@gmail.com, T. Fuchida5 fuchida@sp.cosmos.ehime-u.ac.jp, K. Kondoh6 kondo@cosmos.ehime-u.ac.jp |
| Source: |
Astrophysical Journal. 9/1/2016, Vol. 828 Issue 1, p1-1. 1p. |
| Subject Terms: |
*MAGNETIC reconnection, *ASTROPHYSICS, *MAGNETIC flux density, *PARTICLE acceleration, *NUCLEAR physics |
| Abstract: |
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. [ABSTRACT FROM AUTHOR] |
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| Database: |
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