Quasiperiodic Slipping Motion of Flare Ribbon Fine Structures Anchored in a Sunspot Light Bridge
文献类型：期刊论文
| 作者 | Chen TY(陈添源)1,3; Yan XL(闫晓理)1,2; Xue ZK(薛志科)1,2; Wang JC(王金成)1,2; Xu Z(徐喆)1,2; Yang LH(杨丽恒)1,2; Duan YD(段雅丹)1,2; Zhou YA(周羿安)1; Wu ZY(吴宗银)1,3; Dong QF(董起帆)1,3 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2026-04-01 |
| 卷号 | 1000期号:2 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ae4d10 |
| 产权排序 | 第1完成单位 |
| 文献子类 | Article |
| 英文摘要 | We used high-resolution observations from the New Vacuum Solar Telescope and the Solar Dynamics Observatory to perform a detailed multiwavelength analysis of the fine structures in the flare ribbon of a C3.9-class flare on 2021 April 22. A segment of the flare ribbon was rooted in a sunspot light bridge and exhibited discrete substructures that we term burrs, with equivalent diameters of 233-895 km and intercore separations of 1129-1739 km. These structures are characterized by discrete redshifted cores, accompanied by tails (length 700-1370 km and width 310-600 km) exhibiting faint blueshifts. These structures exhibit systematic slipping motions along the ribbon, with apparent velocities decelerating from about 40-21 km s-1, and display a distinct quasiperiodicity of similar to 6 minutes in H alpha and extreme-ultraviolet passbands. Differential emission measure (DEM) analysis confirms the emitting plasma is multithermal, dominated by temperatures of 1-2 MK. The observed morphology and kinematics are consistent with the scenario of impulsive energy deposition by precipitating plasmoids (oblique flux ropes) originating from tearing-mode fragmentation in the coronal current sheet. The specific spatiotemporal correlation between the tails and blueshifts supports the hypothesis of untwisting magnetic flux ropes. Furthermore, the similar to 6 minute periodicity suggests that the reconnection process may be modulated by photospheric p-mode oscillations coupled with the tearing-mode instability. Our findings provide observational evidence that these light-bridge-anchored fine structures constitute elementary units of flare energy release. |
| 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 | 3-DIMENSIONAL MAGNETIC RECONNECTION ; DIFFERENTIAL EMISSION MEASURE ; RUNNING RECONNECTION ; SEPARATRIX LAYERS ; SOLAR-TELESCOPE ; DYNAMICS ; EVOLUTION ; MODEL ; PROMINENCES ; PULSATIONS |
| 资助项目 | MOST divided by National Key Research and Development Program of China (NKPs)[No.2024YFA1612001] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001720963300001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | MOST divided by National Key Research and Development Program of China (NKPs)[No.2024YFA1612001] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/29066]  |
| 专题 | 云南天文台_抚仙湖太阳观测站 |
| 通讯作者 | Yan XL(闫晓理) |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People’s Republic of China; yanxl@ynao.ac.cn; 2.Yunnan Key Laboratory of Solar Physics and Space Science, Kunming 650216, People’s Republic of China 3.University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China; |
| 推荐引用方式 GB/T 7714 | Chen TY,Yan XL,Xue ZK,et al. Quasiperiodic Slipping Motion of Flare Ribbon Fine Structures Anchored in a Sunspot Light Bridge[J]. ASTROPHYSICAL JOURNAL,2026,1000(2). |
| APA | 陈添源.,闫晓理.,薛志科.,王金成.,徐喆.,...&张鑫生.(2026).Quasiperiodic Slipping Motion of Flare Ribbon Fine Structures Anchored in a Sunspot Light Bridge.ASTROPHYSICAL JOURNAL,1000(2). |
| MLA | 陈添源,et al."Quasiperiodic Slipping Motion of Flare Ribbon Fine Structures Anchored in a Sunspot Light Bridge".ASTROPHYSICAL JOURNAL 1000.2(2026). |
入库方式： OAI收割
来源：云南天文台
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