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Broadband radio bursts and fine structures during the great solar event on 14 July 2000
Wang, SJ; Yan, YH; Zhao, RZ; Fu, QJ; Tan, CM; Xu, L; Wang, SJ; Lin, H
2001-12-01
Source PublicationSOLAR PHYSICS
Volume204Issue:1-2Pages:155-166
Abstract25 MHz-7.6 GHz global and detailed (fine structure - FS) radio spectra are presented, which were observed in the NOAA 9077 active region for the Bastille Day (14 July 2000) flare at 10:10-11:00 UT. Besides broadband radio bursts, high-resolution dynamic spectra reveal metric type II burst, decimetric type IV burst and various decimetric and microwave FSs, such as type III bursts, type U bursts, reverse-slope (RS)-drifting burst, fiber bursts, patch and drifting pulsation structure (DPS). The peak-flux-density spectrum of the radio bursts over the range 1.0-7.6 GHz globally appears as a U-shaped signature. Analyzing the features of backbone and herringbones of the type II burst, the speeds of shock and relevant energetic electron beams were estimated to be 1100 km s(-1) and 58 500 km s(-1), respectively. Also the time sequence of the radio emission is analyzed by comparing with the hard X-rays (HXRs) and the soft X-rays (SXRs) in this flare. After the maxima of the X-rays, the radio emission in the range 1.0-7.6 GHz reached maxima first at the higher frequency, then drifted to the lower frequency. This comparison suggested that the flare included three successive processes: firstly the X-rays rose and reached maxima at 10:10-10:23 UT, accompanied by fine structures only in the range 2.6-7.6 GHz; secondly the microwave radio emission reached maxima accompanied by many fine structures over the range 1.0-7.6 GHz at 10:23-10:34 UT; then a decimetric type IV burst and its associated FSs (fibers) in the range 1.0-2.0 GHz appeared after 10:40 UT.
Indexed BySCI
Language英语
WOS IDWOS:000173992700010
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8570
Collection太阳物理研究部
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Xidian Univ, Sch Sci, Xian 710071, Peoples R China
3.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
4.Chinese Acad Sci, Ctr Space Sci & Appl Res, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Wang, SJ,Yan, YH,Zhao, RZ,et al. Broadband radio bursts and fine structures during the great solar event on 14 July 2000[J]. SOLAR PHYSICS,2001,204(1-2):155-166.
APA Wang, SJ.,Yan, YH.,Zhao, RZ.,Fu, QJ.,Tan, CM.,...&Lin, H.(2001).Broadband radio bursts and fine structures during the great solar event on 14 July 2000.SOLAR PHYSICS,204(1-2),155-166.
MLA Wang, SJ,et al."Broadband radio bursts and fine structures during the great solar event on 14 July 2000".SOLAR PHYSICS 204.1-2(2001):155-166.
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