Nonthermal electrons responsible for solar radio and X-ray emissions

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 太阳活动的多波段观测研究团组

	Nonthermal electrons responsible for solar radio and X-ray emissions
	Huang, GL ; Qin, ZH
刊名	NEW ASTRONOMY
	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.