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Nonpotential Magnetic Fields with Emerging Magnetic Flux in a Solar-flare-productive Active Region

文献类型：期刊论文

作者Zhang, Hongqi3; Liu, Suo3; Zhang, Yin3; Ruan, Guiping4; Guo, Juan5; Li XB(李小波)1; Xie, Wenbin2; Chen, Jie3
刊名ASTROPHYSICAL JOURNAL
出版日期2026-04-01
卷号1000期号:2
ISSN号0004-637X
DOI10.3847/1538-4357/ae4deb
产权排序第4完成单位
文献子类Article
英文摘要Using a developing delta-class solar active region (NOAA 12673) as a case study, we analyzed the distribution of solar vector magnetic fields and derived the corresponding magnetic energy and helicity densities from vector magnetograms to characterize the relationship between free magnetic energy and potential energy. Our findings indicate that the accumulation of magnetic free energy density and the dynamic evolution of the current helicity primarily occur near the magnetic neutral line associated with the magnetic flux emergence. The free magnetic energy density is found to originate from two sources: the nonpotential energy density ( Bn2/8 pi ) and the interactive magnetic energy density (Bn & centerdot; Bp/4 pi), where Bn represents the nonpotential component and Bp the potential component of the magnetic field. Notably, the interactive term Bn & centerdot; Bp also provides a significant contribution to the free energy in the solar atmosphere. Furthermore, we examined correlations between physical parameters, such as nonpotential magnetic energy and current helicity, and flare activity during the energy accumulation phase over the long-term evolution to avoid limitations in studies of solar eruptive activity caused by the lack of magnetic field observations in the upper solar atmosphere. It is found that the energy derived from the photospheric transverse magnetic field persists in accumulating even as the apparent magnetic field gradually weakens, until the onset of the X-class flares. Our analysis established reference thresholds for predicting M-class and X-class flares in newly emerging magnetically active regions. Understanding how magnetic energy accumulates to trigger solar flares and coronal mass ejections is crucial for advancing our knowledge of solar activity and space weather forecasting.
学科主题天文学 ; 太阳与太阳系
URL标识查看原文
出版地No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND
WOS关键词EVOLUTION ; HELICITY ; SHEAR ; ERUPTION ; CURRENTS ; DRIVEN ; MOTION
资助项目National Natural Science Foundation of China[11427803]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001722009800001
出版者IOP Publishing Ltd
资助机构National Natural Science Foundation of China[11427803]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/29067]  
专题云南天文台_人教处
通讯作者Zhang, Hongqi
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People’s Republic of China;
2.College of Physics and Electronic Information Engineering, Guangxi Minzu Normal University, Chongzuo 532200, People’s Republic of China
3.State Key Laboratory of Solar Activity and Space Weather, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China; hzhang@bao.ac.cn;
4.School of Space Science and Technology, Shandong University, Weihai 264209, People’s Republic of China;
5.State Key Laboratory of Solar Activity and Space Weather, National Space Science Center of Chinese Academy of Sciences, Beijing 100084, People’s Republic of China;
推荐引用方式
GB/T 7714		 Zhang, Hongqi,Liu, Suo,Zhang, Yin,et al. Nonpotential Magnetic Fields with Emerging Magnetic Flux in a Solar-flare-productive Active Region[J]. ASTROPHYSICAL JOURNAL,2026,1000(2).
APA Zhang, Hongqi.,Liu, Suo.,Zhang, Yin.,Ruan, Guiping.,Guo, Juan.,...&Chen, Jie.(2026).Nonpotential Magnetic Fields with Emerging Magnetic Flux in a Solar-flare-productive Active Region.ASTROPHYSICAL JOURNAL,1000(2).
MLA Zhang, Hongqi,et al."Nonpotential Magnetic Fields with Emerging Magnetic Flux in a Solar-flare-productive Active Region".ASTROPHYSICAL JOURNAL 1000.2(2026).

入库方式： OAI收割

来源：云南天文台

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