Statistical analysis of solar radio fiber bursts and relations with flares

doi:10.1051/0004-6361/202140498

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	Statistical analysis of solar radio fiber bursts and relations with flares
	Wan, Junlin 1,2; Tang, Jianfei 1,3; Tan, Baolin 2,3; Shen, Jinhua 1,3; Tan, Chengming 2,3
刊名	ASTRONOMY & ASTROPHYSICS
	2021-09-07
卷号	653 页码:11
关键词	Sun corona Sun flares Sun radio radiation
ISSN号	0004-6361
DOI	10.1051/0004-6361/202140498
通讯作者	Tang, Jianfei(jftang@xao.ac.cn)
英文摘要	Fiber bursts are a type of fine structure that frequently occurs in solar flares. Although observations and theory of fiber bursts have been studied for decades, their microphysical process, emission mechanism, and especially the physical links with the flaring process still remain unclear. We performed a detailed statistical study of fiber bursts observed by the Chinese Solar Broadband Radio Spectrometers in Huairou with high spectral-temporal resolutions in the frequency ranges of 1.10-2.06 GHz and 2.60-3.80 GHz during 2000-2006. We identify more than 900 individual fiber bursts in 82 fiber events associated with 48 solar flares. From the soft X-ray observations of the Geostationary Operational Environmental Satellite, we found that more than 40% of fiber events occurred in the preflare and rising phases of the associated solar flares. Most fiber events are temporally associated with hard X-ray bursts observed by RHESSI or microwave bursts observed by the Nobeyama Radio Polarimaters, which implies that they are closely related to the nonthermal energetic electrons. The results indicate that most fiber bursts have a close temporal relation with energetic electrons. Most fiber bursts are strongly polarized, and their average duration, relative bandwidth, and relative frequency-drift rate are about 1.22 s, 6.31%, and -0.069 s(-1). The average duration and relative bandwidth of fiber bursts increase with solar flare class. The fiber bursts associated with X-class flares have a significantly lower mean relative frequency-drift rate. The average durations in the postflare phase are clearly longer than the duration in the preflare and rising phases. The relative drift rate in the rising phase is clearly higher than that in preflare and postflare phases. The hyperbola correlation of the average duration and the relative drift rate of the fiber bursts is very interesting. These characteristics are very important for understanding the formation of solar radio fiber bursts and for revealing the nonthermal processes of the related solar flares.
资助项目	NSFC[12173076] ; NSFC[11673055] ; NSFC[11790301] ; NSFC[11973057] ; NSFC[11773061] ; Key Laboratory of Solar Activity at National Astronomical Observatories, CAS ; ISSI-BJ[2018YFA0404602] ; International Partnership Program of Chinese Academy of Sciences[183311KYSB20200003] ; [2018-XBQNXZ-A-009] ; [2017-XBQNXZ-A-007]
WOS关键词	INTERMEDIATE DRIFT BURSTS ; HIGH-RESOLUTION OBSERVATIONS ; FINE-STRUCTURE ; ARTEMIS-JLS ; EMISSION ; GENERATION ; MICROWAVE ; WHISTLERS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	EDP SCIENCES S A
WOS记录号	WOS:000693380000008
资助机构	NSFC ; Key Laboratory of Solar Activity at National Astronomical Observatories, CAS ; ISSI-BJ ; International Partnership Program of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/4263]
专题	研究单元未命名
通讯作者	Tang, Jianfei
作者单位	1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Wan, Junlin,Tang, Jianfei,Tan, Baolin,et al. Statistical analysis of solar radio fiber bursts and relations with flares[J]. ASTRONOMY & ASTROPHYSICS,2021,653:11.
APA	Wan, Junlin,Tang, Jianfei,Tan, Baolin,Shen, Jinhua,&Tan, Chengming.(2021).Statistical analysis of solar radio fiber bursts and relations with flares.ASTRONOMY & ASTROPHYSICS,653,11.
MLA	Wan, Junlin,et al."Statistical analysis of solar radio fiber bursts and relations with flares".ASTRONOMY & ASTROPHYSICS 653(2021):11.