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题名:
Observational characteristics of radio emission related to multi-polar magnetic configuration
作者: Wang, M; Xie, RX; Xu, C; Shi, SB; Yan, YH
关键词: sun : radio radiation ; sun : activity ; sun : flares
刊名: CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
发表日期: 2005
卷: 5, 期:5, 页:508-518
收录类别: SCI
英文摘要: We present a large complex radio burst and its associated fast time structures observed on 2001 April 10 in the frequency range of 0.65-7.6 GHz. The NoRH radio image observation shows very complex radio source structures which include preexisting, newly emerging, submerging/cancelling polarities and a bipolar, a tripolar (a 'bipolar + remote unipolar'), and a quadrupolar structure. This suggests that the radio burst is generated from a very complicated loop structure. According to the spectral and image observations, we assume that the beginning of this flare was caused by a single bipolar loop configuration with a 'Y-type' reconnection structure. A composite of radio continuum and fast time structures is contained in this flare. The various fast radio emission phenomena include normal and reverse drifting type III bursts, and slowly drifting and no-drift structures. The tripolar configurations may form a double-loop with a 'three-legged' structure, which is an important source of the various types of fast time structures. The two-loop reconnection model can lead simultaneously to electron acceleration and corona heating. We have also analyzed the behaviors of coronal magnetic polarities and the emission processes of different types radio emission qualitatively. Interactions of a bipolar or multi-polar loop are consistent with our observational results. Our observations favor the magnetic reconnection configurations of the 'inverted Y-type' (bipolar) and the 'three-legged' structures (tripolar or quadrupolar).
语种: 英语
WOS记录号: WOS:000232872000008
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内容类型: 期刊论文
URI标识: http://ir.bao.ac.cn/handle/114a11/8153
Appears in Collections:太阳物理研究部_期刊论文

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作者单位: 1.Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China

Recommended Citation:
Wang, M,Xie, RX,Xu, C,et al. Observational characteristics of radio emission related to multi-polar magnetic configuration[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2005,5(5):508-518.
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