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Fine structure of microwave emission in the 25 August 1999 event and its association with the magnetic field fine structure
Ledenev, VG; Sych, RA; Yan, Y; Fu, Q; Wu, H
2005-12-01
发表期刊JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
卷号67期号:17-18页码:1720-1727
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.
关键词Solar Flare Microwave Emission Magnetic Field
DOI10.1016/j.jastp.2005.03.009
收录类别ISTP ; SCI
语种英语
WOS记录号WOS:000234449000013
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文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8954
专题光学天文研究部
作者单位1.Inst Solar Terr Phys, Irkutsk 664033, Russia
2.Natl Astron Observ, Beijing 100012, Peoples R China
3.Purple Mt Observ, Nanjing 210008, Peoples R China
4.Natl Inst Space Res, Sao Jose Dos Campos, Brazil
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Ledenev, VG,Sych, RA,Yan, Y,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 Ledenev, VG,Sych, RA,Yan, Y,Fu, Q,&Wu, H.(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 Ledenev, VG,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.
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