Nonthermal electrons responsible for solar radio and X-ray emissions | |
Huang, GL; Qin, ZH | |
刊名 | NEW ASTRONOMY
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1998-03-16 | |
卷号 | 3期号:4页码:231-239 |
关键词 | sun, flares sun, particle emission sun, radio radiation plasmas instabilities |
ISSN号 | 1384-1092 |
英文摘要 | The properties of nonthermal electrons are calculated from solar radio and X-ray bursts based on the intrinsic wave-particle interaction in an unstable radiation process excited by plasma instabilities. One example of multiwavelength observations shows that the density of nonthermal electrons decreases with increasing the energy of single electrons, which just corresponds to a power law distribution with the index of the energy spectrum about 3. The slope of the rising phase increases in the order from low energy to high energy for SXR, HXR, microwave and millimeter wave bands, which is interpreted by the increasing of the ratio between nonthermal and thermal radiation. Moreover, the evolution of nonthermal electrons is calculated from a typical event composed of several pulsations, at both microwave and HXR bursts, the electrons are accelerated in the rising phase and decelerated in the decay phase, while in the meantime the ratio between nonthermal and thermal radiation in the rising phase is larger than that in the decay phase. Hence, not only the acceleration processes but also the wave-particle interaction caused by plasma instabilities contribute to the evolution of the radiation spectrum. (C) 1998 Elsevier Science B. V. |
学科主题 | Astronomy & Astrophysics |
WOS标题词 | Science & Technology ; Physical Sciences |
类目[WOS] | Astronomy & Astrophysics |
研究领域[WOS] | Astronomy & Astrophysics |
关键词[WOS] | CYCLOTRON ; FLARES ; MASER |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000074658000001 |
公开日期 | 2013-02-05 |
内容类型 | 期刊论文 |
源URL | [http://libir.pmo.ac.cn/handle/332002/8349] ![]() |
专题 | 紫金山天文台_太阳活动的多波段观测研究团组 |
作者单位 | 1.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Nanjing Univ, Dept Astron, Nanjing 210008, Peoples R China |
推荐引用方式 GB/T 7714 | Huang, GL,Qin, ZH. Nonthermal electrons responsible for solar radio and X-ray emissions[J]. NEW ASTRONOMY,1998,3(4):231-239. |
APA | Huang, GL,&Qin, ZH.(1998).Nonthermal electrons responsible for solar radio and X-ray emissions.NEW ASTRONOMY,3(4),231-239. |
MLA | Huang, GL,et al."Nonthermal electrons responsible for solar radio and X-ray emissions".NEW ASTRONOMY 3.4(1998):231-239. |
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