DOI: 10.1029/2017JA025071
Scopus记录号: 2-s2.0-85052835470
论文题名: Kinetic Alfvén Waves Excited in Two-Dimensional Magnetic Reconnection
作者: Huang H. ; Yu Y. ; Dai L. ; Wang T.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 8 起始页码: 6655
结束页码: 6669
语种: 英语
英文摘要: Kinetic Alfvén waves (KAWs) are believed to be capable of efficiently transporting energy and play an important role in facilitating magnetic reconnection. KAW eigenmode theory suggests that Hall fields can be considered as the components of KAW, providing a mechanism for the generation and dissipation of KAW in magnetic reconnection. Using particle-in-cell simulations, we examined Hall fields in the magnetic reconnection region and found that (1) Hall electric filed is balanced by the ion pressure gradient and (2) the ratio of Hall electric field to Hall magnetic field is on the order of Alfvén speed. These results are consistent with KAW physics. Simulation results also indicate that KAWs are excited in the reconnection site and then transmitted along the separatrices. The wave Poynting flux propagates parallel to the magnetic field lines, carrying substantial energy. It is further found that a thinner current sheet provides a favorable condition for the excitation of KAW and results in a higher ratio of the Hall fields. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113331
Appears in Collections: 气候减缓与适应
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作者单位: School of Space and Environment, Beihang University, Beijing, China; State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing, China; RAL Space, Rutherford Appleton Laboratory, Harwell Oxfor, Didcot, United Kingdom
Recommended Citation:
Huang H.,Yu Y.,Dai L.,et al. Kinetic Alfvén Waves Excited in Two-Dimensional Magnetic Reconnection[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(8)