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题名: The direct amplification of electromagnetic waves by electron beams: An alternate explanation for solar type III bursts
作者: Huang, GL
刊名: ASTROPHYSICAL JOURNAL
出版日期: 1998-05-10
卷号: 498, 期号:2, 页码:877-885
关键词: MHD ; plasmas ; Sun, particle emission ; Sun, radio radiation
文章类型: Article
英文摘要: The direct amplification of electromagnetic (EM) waves by the beam-plasma instability is proposed as an alternative for solar type III bursts in corona and planetary space, the main properties of type III bursts at meter bands are compared to this model, including the cutoff frequency, the timescale, the relative bandwidth, the polarization sense and degree, and the harmonic emission. This mechanism may explain the reason why the cutoff frequency or the low-frequency limit of type III bursts observed by the Ulysses spacecraft is much larger than the local electron plasma frequency, which may have resulted from the variation of the heliocentric distance of the spacecraft as well as the ratio between the local electron plasma and cyclotron frequencies.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: RADIO-EMISSION PROCESSES ; CLUMPY LANGMUIR-WAVES ; ULYSSES OBSERVATIONS ; PLASMA ; FREQUENCY ; INSTABILITY ; CYCLOTRON
收录类别: SCI
语种: 英语
WOS记录号: WOS:000073669300033
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/15987
Appears in Collections:太阳活动的多波段观测研究团组_期刊论文

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作者单位: 1.Purple Mt Observ, Nanjing 210008, Peoples R China
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