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Observational characteristics of radio emission related to multi-polar magnetic configuration
Wang, M; Xie, RX; Xu, C; Shi, SB; Yan, YH
2005
发表期刊CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
卷号5期号:5页码:508-518
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).
关键词Sun : Radio Radiation Sun : Activity Sun : Flares
收录类别SCI
语种英语
WOS记录号WOS:000232872000008
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文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8153
专题太阳物理研究部
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
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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.
APA Wang, M,Xie, RX,Xu, C,Shi, SB,&Yan, YH.(2005).Observational characteristics of radio emission related to multi-polar magnetic configuration.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,5(5),508-518.
MLA Wang, M,et al."Observational characteristics of radio emission related to multi-polar magnetic configuration".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 5.5(2005):508-518.
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