Fine structure of microwave emission in the 25 August 1999 event and its association with the magnetic field fine structure

doi:10.1016/j.jastp.2005.03.009

	Fine structure of microwave emission in the 25 August 1999 event and its association with the magnetic field fine structure
	Wu, H; Ledenev, VG ; Sych, RA ; Yan, Y; Fu, Q
刊名	JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
	2005-12-01
卷号	67 期号:17-18 页码:1720-1727
关键词	Solar Flare Microwave Emission Magnetic Field
DOI	10.1016/j.jastp.2005.03.009
英文摘要	A study is made of the initial stage of the 25 August 1999, event using high time-resolution microwave observations, as well as the data from the Siberian Solar Radio Telescope and Yohkoh/SXT/HXT. Microwave emission revealed fine structures with a typical time scale of about 1 s with a frequency drift similar to 1 GHz/s, and structures with a typical time scale of less than 0.1 s with a frequency drift similar to 10 GHz/s. Emission bands with a slower frequency drift are generated by energetic electrons subjected to the cyclotron resonance condition. This slower frequency drift is a consequence of a change in plasma density caused by the coalescence of magnetic structures with a typical size of the order of -10(8) cm, while the emission with a faster drift is generated by beams of energetic electrons generating Cherenkov resonance emission. The energetic electron beams are produced as a result of the interaction of magnetic structures similar to 10(6)-10(7) cm in size. (c) 2005 Elsevier Ltd. All rights reserved.
语种	英语
WOS记录号	WOS:000234449000013
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/8954]
专题	国家天文台_光学天文研究部
作者单位	1.Natl Astron Observ, Beijing 100012, Peoples R China 2.Inst Solar Terr Phys, Irkutsk 664033, Russia 3.Purple Mt Observ, Nanjing 210008, Peoples R China 4.Natl Inst Space Res, Sao Jose Dos Campos, Brazil
推荐引用方式 GB/T 7714	Wu, H,Ledenev, VG,Sych, RA,et al. Fine structure of microwave emission in the 25 August 1999 event and its association with the magnetic field fine structure[J]. JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS,2005,67(17-18):1720-1727.
APA	Wu, H,Ledenev, VG,Sych, RA,Yan, Y,&Fu, Q.(2005).Fine structure of microwave emission in the 25 August 1999 event and its association with the magnetic field fine structure.JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS,67(17-18),1720-1727.
MLA	Wu, H,et al."Fine structure of microwave emission in the 25 August 1999 event and its association with the magnetic field fine structure".JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS 67.17-18(2005):1720-1727.