NAOC Open IR
Naked emergence of an anti-Hale active region I. Overall evolution and magnetic properties
Wang, Jincheng1,2,3; Yan, Xiaoli1,3; Kong, Defang1,3; Xue, Zhike1,3; Yang, Liheng1,3; Li, Qiaoling1,4; Zhang, Yan1,4; Li, Hao5,6
2021-08-11
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume652Pages:14
AbstractAims. In order to understand the emergence of the active region, we investigate the emerging process and magnetic properties of a naked anti-Hale active region during the period between August 24 to 25, 2018. Methods. Using the data from Helioseismic and Magnetic Imager on board the Soar Dynamic Observatory and the New Vacuum Solar Telescope, we calculated different evolving parameters (such as pole separation, tilt angle) and magnetic parameters (such as vertical electric current, force-free parameter, relative magnetic helicity) during the emergence of the active region. With these calculated parameters and some reasonable assumptions, we use two different methods to estimate the twist of the active region. Results. The magnetic flux and pole separation continue increasing while the tilt angle exhibits a decreasing pattern during the emergence of the active region. The increase of the pole separation is mainly contributed as a result of the enhancement in the longitude direction. A power-law relationship between pole separation and total flux is found during the emergence of the active region. On the other hand, it is found that both the positive and negative electric currents increased equivalently and the average flux-weighted force-free parameter (alpha) over tilde remains almost consistently positive, on the order of similar to 10(-8) m(-1). The relative magnetic helicity is mainly contributed by the shear term, while the relative magnetic helicity injection flux of the shear term changes its sign at the latter stage of the emergence. The twist number of the whole active region remains on the order of 10(-1) turns during the emergence of the active region. Conclusions. We find that the magnetic flux tube with low twist also could emerge into the solar atmosphere.
Keywordsunspots Sun: evolution Sun: magnetic fields
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; Yunnan Science Foundation of China ; Yunnan Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Yunnan Talent Science Foundation of China ; Yunnan Talent Science Foundation of China ; Yunnan Science Foundation for Distinguished Young Scholars ; Yunnan Science Foundation for Distinguished Young Scholars ; Key Research and Development Project of Yunnan Province ; Key Research and Development Project of Yunnan Province ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; Yunnan Science Foundation of China ; Yunnan Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Yunnan Talent Science Foundation of China ; Yunnan Talent Science Foundation of China ; Yunnan Science Foundation for Distinguished Young Scholars ; Yunnan Science Foundation for Distinguished Young Scholars ; Key Research and Development Project of Yunnan Province ; Key Research and Development Project of Yunnan Province ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; Yunnan Science Foundation of China ; Yunnan Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Yunnan Talent Science Foundation of China ; Yunnan Talent Science Foundation of China ; Yunnan Science Foundation for Distinguished Young Scholars ; Yunnan Science Foundation for Distinguished Young Scholars ; Key Research and Development Project of Yunnan Province ; Key Research and Development Project of Yunnan Province ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; Yunnan Science Foundation of China ; Yunnan Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Yunnan Talent Science Foundation of China ; Yunnan Talent Science Foundation of China ; Yunnan Science Foundation for Distinguished Young Scholars ; Yunnan Science Foundation for Distinguished Young Scholars ; Key Research and Development Project of Yunnan Province ; Key Research and Development Project of Yunnan Province
DOI10.1051/0004-6361/202140685
WOS KeywordELECTRIC-CURRENT NEUTRALIZATION ; FLUX-TUBE EMERGENCE ; CURRENT PATTERNS ; HELICITY ; FIELD ; ENERGY ; TWIST ; INJECTION ; TRANSPORT ; TILT
Language英语
Funding ProjectNational Key R&D Program of China[2019YFA0405000] ; National Science Foundation of China (NSFC)[12003064] ; National Science Foundation of China (NSFC)[11873087] ; National Science Foundation of China (NSFC)[11803085] ; Yunnan Science Foundation of China[2019FD085] ; CAS "Light of West China" Program[Y9XB018001] ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences[KLSA202014] ; Yunnan Talent Science Foundation of China[2018FA001] ; Yunnan Science Foundation for Distinguished Young Scholars[202001AV070004] ; Key Research and Development Project of Yunnan Province[202003AD150019]
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; Yunnan Science Foundation of China ; Yunnan Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Yunnan Talent Science Foundation of China ; Yunnan Talent Science Foundation of China ; Yunnan Science Foundation for Distinguished Young Scholars ; Yunnan Science Foundation for Distinguished Young Scholars ; Key Research and Development Project of Yunnan Province ; Key Research and Development Project of Yunnan Province ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; Yunnan Science Foundation of China ; Yunnan Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Yunnan Talent Science Foundation of China ; Yunnan Talent Science Foundation of China ; Yunnan Science Foundation for Distinguished Young Scholars ; Yunnan Science Foundation for Distinguished Young Scholars ; Key Research and Development Project of Yunnan Province ; Key Research and Development Project of Yunnan Province ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; Yunnan Science Foundation of China ; Yunnan Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Yunnan Talent Science Foundation of China ; Yunnan Talent Science Foundation of China ; Yunnan Science Foundation for Distinguished Young Scholars ; Yunnan Science Foundation for Distinguished Young Scholars ; Key Research and Development Project of Yunnan Province ; Key Research and Development Project of Yunnan Province ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; Yunnan Science Foundation of China ; Yunnan Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Yunnan Talent Science Foundation of China ; Yunnan Talent Science Foundation of China ; Yunnan Science Foundation for Distinguished Young Scholars ; Yunnan Science Foundation for Distinguished Young Scholars ; Key Research and Development Project of Yunnan Province ; Key Research and Development Project of Yunnan Province
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000683963000003
PublisherEDP SCIENCES S A
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/75842
Collection中国科学院国家天文台
Corresponding AuthorWang, Jincheng
Affiliation1.Chinese Acad Sci, Yunnan Observ, Kunming 650216, Yunnan, Peoples R China
2.Natl Astron Observ, CAS Key Lab Solar Act, Beijing 100012, Peoples R China
3.Chinese Acad Sci, Ctr Astron Megasci, 20A Datun Rd, Beijing 100012, Peoples R China
4.Univ Chinese Acad Sci, Yuquan Rd,Shijingshan Block, Beijing 100049, Peoples R China
5.Inst Astrofis Canarias, Tenerife 38205, Spain
6.Univ La Laguna, Dept Astrofis, Tenerife 38206, Spain
Recommended Citation
GB/T 7714
Wang, Jincheng,Yan, Xiaoli,Kong, Defang,et al. Naked emergence of an anti-Hale active region I. Overall evolution and magnetic properties[J]. ASTRONOMY & ASTROPHYSICS,2021,652:14.
APA Wang, Jincheng.,Yan, Xiaoli.,Kong, Defang.,Xue, Zhike.,Yang, Liheng.,...&Li, Hao.(2021).Naked emergence of an anti-Hale active region I. Overall evolution and magnetic properties.ASTRONOMY & ASTROPHYSICS,652,14.
MLA Wang, Jincheng,et al."Naked emergence of an anti-Hale active region I. Overall evolution and magnetic properties".ASTRONOMY & ASTROPHYSICS 652(2021):14.
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