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题名: The effect of electron beams on cyclotron maser emission excited by lower-energy cutoffs
作者: Zhao, G. Q.1; Feng, H. Q.1; Wu, D. J.2
刊名: PHYSICS OF PLASMAS
出版日期: 2016-05-01
卷号: 23, 期号:5
DOI: 10.1063/1.4948713
文章类型: Article
英文摘要: Electron-cyclotron maser (ECM) is one of the most important emission mechanisms in astrophysics and can be excited efficiently by lower-energy cutoffs of power-law electrons. These non-thermal electrons probably propagate as a directed collimated beam along ambient magnetic fields. This paper investigates the ECM, in which the effect of electron beams is emphasized. Results show the dependence of emission properties of the ECM on the beam feature. The maximum growth rate of the extraordinary mode (X2) rapidly decreases as the beam momentum increases, while the growth rate of the ordinary mode (O1) changes slightly. In particular, the ordinary mode can overcome the extraordinary mode and becomes the fastest growth mode once the beam momentum is large enough. This research presents an extension of the conventional studies on ECM driven by lower-energy cutoffs and may be helpful to understand better the emission process of solar type I radio bursts, which are dominated by the ordinary mode emission. Published by AIP Publishing.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Physics, Fluids & Plasmas
研究领域[WOS]: Physics
关键词[WOS]: TERRESTRIAL KILOMETRIC RADIATION ; POWER-LAW ELECTRONS ; SOLAR RADIO-BURSTS ; DIRECT AMPLIFICATION ; MAGNETIC-FIELD ; NONTHERMAL ELECTRONS ; PARTICLE-ACCELERATION ; ULTRACOOL DWARFS ; CURRENT REGION ; CORONAL LOOPS
收录类别: SCI
项目资助者: NSFC(41504131 ; Science and Technology Project of Henan Province(13IRTSTHN020 ; 41274180 ; 142102210109) ; 41231068 ; 41531071 ; 11373070)
语种: 英语
WOS记录号: WOS:000378427900014
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16249
Appears in Collections:太阳和太阳系等离子体研究团组_期刊论文

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作者单位: 1.Luoyang Normal Univ, Inst Space Phys, Luoyang, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, Nanjing, Jiangsu, Peoples R China
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