中国科学院紫金山天文台机构知识库
Advanced  
PMO OpenIR  > 太阳和太阳系等离子体研究团组  > 期刊论文
题名: Research Progress of Electron Cyclotron Maser Emission on Solar Physics
作者: Tang Jianfei; Wu Dejin; Zhao Guoqing; Chen Ling
刊名: Progress in Astronomy
出版日期: 2017
卷号: 35, 期号:2, 页码:149-174
英文摘要: Electron-cyclotron maser (ECM) emission is a well-known radiation emission mechanism in astrophysics. It has been extensively applied to various nonthermal coherent radio emission, especially to the short-timescale coherent radio bursts. Excitation of electron cyclotron maser radiation requires two basic conditions. One is the inversion distribution of the energetic electrons in the direction perpendicular to the ambient magnetic field. The other is the escape difficulty that requires the local electron cyclotron frequency over the plasma frequency. These two conditions are hardly satisfied in the corona under the conventional solar atmosphere models, which limit the application of ECM emission mechanism to solar radio astronomy. In general, flare associated energetic electrons are accelerated initially mainly along the magnetic field, it means that these energetic electrons do not have enough free energy to drive ECM emission. After the energetic electrons leave the acceleration site and propagate in the solar atmosphere, the energy of the energetic electrons in the parallel orientation can be transfer to the perpendicular orientation, and form an anisotropic distribution due to the interaction of energetic electrons with magnetic field and plasma waves. For the escape difficulty, a density depletion duct in the corona is necessary and may be rational as optical observations show fibrous density structures exist commonly in the corona. This paper presents a systematic review on the recent development of ECM emission mechanism, especially on the new models which may overcome the above difficulties and can be applied in several kinds of solar radio bursts, such as type I bursts, type II bursts, and type V bursts. Some perspectives on the study of ECM mechanism and solar radio emission processes are also presented.
语种: 英语
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/17393
Appears in Collections:太阳和太阳系等离子体研究团组_期刊论文

Files in This Item:
File Name/ File Size Content Type Version Access License
2017173.pdf(2278KB)期刊论文作者接受稿限制开放View 联系获取全文
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Tang Jianfei]'s Articles
[Wu Dejin]'s Articles
[Zhao Guoqing]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Tang Jianfei]‘s Articles
[Wu Dejin]‘s Articles
[Zhao Guoqing]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
文件名: 2017173.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2018  中国科学院紫金山天文台 - Feedback
Powered by CSpace