CME影响下L1点附近等离子体及共生微波爆发的射电辐射机制研究

	CME影响下L1点附近等离子体及共生微波爆发的射电辐射机制研究
	孙伟英 ; 吴季
刊名	空间科学学报
	2005
卷号	25 期号:3 页码:167-172
关键词	射电辐射 CME 机制研究共生 1999年8月辐射机制空间等离子体等离子体参数太阳微波爆发电子回旋脉泽等离子体辐射分析结果轫致辐射拉格朗日点相互作用星际介质发展过程发生情况统计分析发生变化复合辐射
ISSN号	0254-6124
其他题名	Study on the Radiation Mechanism of PlasmasNear L 1 Point Affected by CMEs and the Associated Microwave Bursts
通讯作者	北京8701信箱
中文摘要	CME在产生和发展过程中与日冕和行星际介质相互作用并发出不同波长的射电辐射.在研究了无CME时空间等离子体的各种辐射机制基础上,统计分析了1999年2月至1999年8月期间有较大的CME发生情况下,在CME影响下L1拉格朗日点附近等离子体参数发生变化后的射电辐射机制.分析结果表明,其射电辐射机制主要是轫致辐射,微量的回旋辐射和更加微弱的复合辐射.此外,分析讨论了1999年2月至1999年8月期间与CME共生的太阳微波爆发.分析结果表明,与CME共生的是微波逐渐型爆发,尖峰爆发,其辐射机制主要是轫致辐射,回旋共振辐射,等离子体辐射及电子回旋脉泽辐射.
英文摘要	Coronal mass ejections are large-scale magnetic structures expelled from the sun due to MHD processes involving interaction between plasmas and magnetic field in closed field regions.Radiation with different wavelength is emitted because of reciprocity of coronal mass ejections with corona and interplanetary medium. A comprehensive survey is made on coronal mass ejections occurred from February 1999 to August 1999 which were observed by LASCO and the ground radio spectrometer in Purple Mountain Observatory and Yunnan Observatory. Special attentions are focused on the emission mechanisms of space plasmas near L1 (the first Lagrange point of solar-earth system) which are affected by very large coronal mass ejections. Statistical analysis is also made based on the study of the radiation mechanisms of space plasmas during quiet sun period.The results show that the dominating radiation mechanisms are bremsstrahlung, a small quantity of cyclotron radiation and a less quantity of recombination radiation. Moreover, solar radio microwave bursts which accompany with coronal mass ejections during February 1999 to August 1999 are analyzed.radiation The findings indicate that they are gradual bursts and spike bursts. The dominating mechanisms of the solar radio microwave bursts are bremsstrahlung, cyclotron resonant plasmas radiation and electronic cyclotron maser radiation.
学科主题	微波遥感
收录类别	CSCD
资助信息	国家863项目13主题资助课题
语种	中文
CSCD记录号	CSCD:1967520
内容类型	期刊论文
源URL	[http://ir.cssar.ac.cn/handle/122/1890]
专题	国家空间科学中心_微波遥感部
推荐引用方式 GB/T 7714	孙伟英,吴季. CME影响下L1点附近等离子体及共生微波爆发的射电辐射机制研究[J]. 空间科学学报,2005,25(3):167-172.
APA	孙伟英,&吴季.(2005).CME影响下L1点附近等离子体及共生微波爆发的射电辐射机制研究.空间科学学报,25(3),167-172.
MLA	孙伟英,et al."CME影响下L1点附近等离子体及共生微波爆发的射电辐射机制研究".空间科学学报 25.3(2005):167-172.