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High-resolution Chromospheric Observations of a Solar Minifilament: Formation and Destabilization
Chen, Hechao1,2,3; Hong, Junchao1,3,4; Yang, Bo1,3; Xu, Zhe3,5; Yang, Jiayan1,3
2020-10-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume902Issue:1Pages:12
AbstractUsing H(alpha)line core and off-band imaging data from the New Vacuum Solar Telescope in China, we present a high-resolution observation on the entire life cycle of a solar minifilament from its birth to its final eruption. We find that the minifilament originates from a series of cascade-like reconfigurations of chromospheric fine structures. During which, owing to strong photospheric shearing and converging flows near its polarity inversion line, basic short chromospheric fibrils first slowly coalesce to elongated dark threads, and then further create a longer filament channel in a "head-to-tail" linkage scenario. In this course, obvious magnetic flux cancelation simultaneously proceeds below it, and further facilitates its destabilization. In its onset phase, clear clues indicate that the minifilament first starts to rise without brightening signals; instead, after a slow-to-fast acceleration, obvious runaway reconnection soon takes over its final jet-like eruption. Besides, off-band observations further reveal that the formed minifilament has a possible flux-rope configuration, and chromospheric upflows that detected in its early forming phase persistently supplies cool plasma into its channel. This observation is consistent with earlier observations and supports the view that both miniature and large-scale filaments may share analogous formation and destabilization mechanisms.
KeywordSolar activity Solar filaments Solar magnetic fields
Funding OrganizationB-type Strategic Priority Program - Chinese Academy of Sciences ; B-type Strategic Priority Program - Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; B-type Strategic Priority Program - Chinese Academy of Sciences ; B-type Strategic Priority Program - Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; B-type Strategic Priority Program - Chinese Academy of Sciences ; B-type Strategic Priority Program - Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; B-type Strategic Priority Program - Chinese Academy of Sciences ; B-type Strategic Priority Program - Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program
DOI10.3847/1538-4357/abb1c1
WOS KeywordMAGNETIC-FLUX ; PLASMA MOTIONS ; ACTIVE-REGION ; CORONAL JETS ; QUIET SUN ; ERUPTIONS ; PROMINENCE ; EMERGENCE
Language英语
Funding ProjectB-type Strategic Priority Program - Chinese Academy of Sciences[XDB41000000] ; National Natural Science Foundation of China[11703084] ; National Natural Science Foundation of China[11633008] ; National Natural Science Foundation of China[11933009] ; CAS "Light of West China" Program
Funding OrganizationB-type Strategic Priority Program - Chinese Academy of Sciences ; B-type Strategic Priority Program - Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; B-type Strategic Priority Program - Chinese Academy of Sciences ; B-type Strategic Priority Program - Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; B-type Strategic Priority Program - Chinese Academy of Sciences ; B-type Strategic Priority Program - Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; B-type Strategic Priority Program - Chinese Academy of Sciences ; B-type Strategic Priority Program - Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000577418100001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/81975
Collection中国科学院国家天文台
Corresponding AuthorChen, Hechao
Affiliation1.Chinese Acad Sci, Yunnan Observ, 396 Yangfangwang, Kunming 650216, Yunnan, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Ctr Astron Megasci, 20A Datun Rd, Beijing 100012, Peoples R China
4.Chinese Acad Sci, Natl Astron Observat, Key Lab Solar Act, Beijing 100012, Peoples R China
5.Chinese Acad Sci, Purple Mt Observ, 8 Yuanhua Rd, Nanjing 210034, Peoples R China
Recommended Citation
GB/T 7714
Chen, Hechao,Hong, Junchao,Yang, Bo,et al. High-resolution Chromospheric Observations of a Solar Minifilament: Formation and Destabilization[J]. ASTROPHYSICAL JOURNAL,2020,902(1):12.
APA Chen, Hechao,Hong, Junchao,Yang, Bo,Xu, Zhe,&Yang, Jiayan.(2020).High-resolution Chromospheric Observations of a Solar Minifilament: Formation and Destabilization.ASTROPHYSICAL JOURNAL,902(1),12.
MLA Chen, Hechao,et al."High-resolution Chromospheric Observations of a Solar Minifilament: Formation and Destabilization".ASTROPHYSICAL JOURNAL 902.1(2020):12.
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