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A self-consistent mechanism for electron cyclotron maser emission and its application to type III solar radio bursts
Chen, L.; Wu, D. J.; Zhao, G. Q.; Tang, J. F.
2017
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
卷号122期号:1页码:35-49
摘要Type III solar radio bursts (SRBs) produced by fast electron beams (FEBs) traveling along solar magnetic fields are the best known and the most important kind of SRBs because of their clearest association with FEBs as well as most frequent observations during solar activities. However, the physics of their emitting mechanism has been a controversial issue. Based on the electron cyclotron maser (ECM) instability driven directly by a magnetized FEB, whose physics is fairly well known from the Earth's auroral kilometric radiation, this paper proposes a self-consistent mechanism for type III SRBs, in which the Alfven wave (AW) produced by the current instability of the beam-return current system associated with the FEB, called the self-generated AW, plays an important and crucial role. Taking into account the return-current effect of the FEB, the growth rate and the saturation intensity of the self-generated AW are estimated. Then the effects of the self-generated AW on the ECM emission via the ECM instability driven by the magnetized FEB are further investigated. The results show that the self-generated AW can significantly influence and change the physical properties of the ECM emission. In particular, this novel ECM emission mechanism can effectively overcome the main difficulties of the conventional ECM emission mechanism in application to type III SRBs and may potentially provide a self-consistent physics scenario for type III SRBs.
语种英语
文献类型期刊论文
条目标识符http://libir.pmo.ac.cn/handle/332002/17390
专题太阳和太阳系等离子体研究团组
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GB/T 7714
Chen, L.,Wu, D. J.,Zhao, G. Q.,et al. A self-consistent mechanism for electron cyclotron maser emission and its application to type III solar radio bursts[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2017,122(1):35-49.
APA Chen, L.,Wu, D. J.,Zhao, G. Q.,&Tang, J. F..(2017).A self-consistent mechanism for electron cyclotron maser emission and its application to type III solar radio bursts.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,122(1),35-49.
MLA Chen, L.,et al."A self-consistent mechanism for electron cyclotron maser emission and its application to type III solar radio bursts".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 122.1(2017):35-49.
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