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Solar Tornadoes Triggered by Interaction between Filaments and EUV Jets
Chen, Huadong1; Zhang, Jun1; Ma, Suli1,2; Yan, Xiaoli3; Xue, Jianchao4
2017-05-20
Source PublicationASTROPHYSICAL JOURNAL LETTERS
ISSN2041-8205
Volume841Issue:1Pages:6
Corresponding AuthorChen, Huadong(hdchen@nao.cas.cn)
AbstractWe investigate the formations and evolutions of two successive solar tornadoes in/near AR 12297 during 2015 March 19-20. Recurrent EUV jets close to two filaments were detected along a large-scale coronal loop prior to the appearances of the tornadoes. Under the disturbances from the activities, the filaments continually ascended and finally interacted with the loops tracked by the jets. Subsequently, the structures of the filaments and the loop were merged together, probably via magnetic reconnections, and formed tornado-like structures with a long spiral arm. Our observations suggest that solar tornadoes can be triggered by the interaction between filaments and nearby coronal jets, which has rarely been reported before. At the earlier development phase of the first tornado, about 30 small-scale sub-jets appeared in the tornado's arm, accompanied by local EUV brightenings. They have an ejection direction approximately vertical to the axis of the arm and a typical maximum speed of similar to 280 km s(-1). During the ruinations of the two tornadoes, fast plasma outflows from the strong EUV brightenings inside tornadoes are observed, in company with the untangling or unwinding of the highly twisted tornado structures. These observational features indicate that self reconnections probably occurred between the tangled magnetic fields of the tornadoes and resulted in the rapid disintegrations and disappearances of the tornadoes. According to the reconnection theory, we also derive the field strength of the tornado core to be similar to 8G.
KeywordSun: activity Sun: filaments, prominences Sun: rotation Sun: UV radiation
DOI10.3847/2041-8213/aa71a2
WOS KeywordH-ALPHA SURGES ; QUIET SUN ; MAGNETIC-FIELDS ; PROMINENCE ; CORONA ; DYNAMICS ; CYCLONES ; ERUPTION ; SDO/AIA ; FLARES
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000402563400011
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23007
Collection中国科学院紫金山天文台
Corresponding AuthorChen, Huadong
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China
2.China Univ Petr, Coll Sci, Qingdao 266580, Peoples R China
3.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China
4.Chinese Acad Sci, Key Lab Dark Matter & Space Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Chen, Huadong,Zhang, Jun,Ma, Suli,et al. Solar Tornadoes Triggered by Interaction between Filaments and EUV Jets[J]. ASTROPHYSICAL JOURNAL LETTERS,2017,841(1):6.
APA Chen, Huadong,Zhang, Jun,Ma, Suli,Yan, Xiaoli,&Xue, Jianchao.(2017).Solar Tornadoes Triggered by Interaction between Filaments and EUV Jets.ASTROPHYSICAL JOURNAL LETTERS,841(1),6.
MLA Chen, Huadong,et al."Solar Tornadoes Triggered by Interaction between Filaments and EUV Jets".ASTROPHYSICAL JOURNAL LETTERS 841.1(2017):6.
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