Fine Structure and Formation Mechanism of a Sunspot Bipolar Light Bridge in NOAA AR 13663
文献类型：期刊论文
| 作者 | Qiao, Fangfang1,2; Li, Hao2; Wang, Jiasheng1; Duan YD(段雅丹)3,4; Sun, Zheng1,5; Li, Leping6 |
| 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/ae4bd9 |
| 产权排序 | 第3完成单位 |
| 文献子类 | Article |
| 英文摘要 | Bipolar light bridges (BLBs) are bright regions located between sunspot umbrae of opposite magnetic polarity. They are typically characterized by strong magnetic fields and intense flows, which are believed to be closely associated with major solar flares. Despite their importance, their fine structure, formation, and evolution remain poorly understood. In this work, we analyze the observations of a well-defined BLB obtained by the Goode Solar Telescope (GST) at the Big Bear Solar Observatory and the Helioseismic and Magnetic Imager (HMI) on board the Solar Dynamics Observatory. The high-resolution GST observations reveal that the BLB is composed of fine, penumbral filament-like structures with widths of approximately 100-150 km. The corresponding Doppler velocity maps present a stable pattern of spatially adjacent red- and blueshifted patches within the BLB throughout the 5.5 hr GST observation. HMI observations show that the BLB arises from the converging and shearing motions of sunspots with opposite polarities. Penumbral regions originating from different polarities gradually evolve and interact, eventually forming the BLB. The observed Doppler velocity pattern, characterized by red- and blueshifted patches, can be interpreted as a projection effect of the Evershed flow within the penumbrae. Therefore, we argue that the BLB is formed through the compression and stretching of penumbral structures from oppositely polarized sunspots. |
| 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 | SOLAR OPTICAL TELESCOPE ; DELTA-TYPE SUNSPOT ; MAGNETIC-FIELD ; PENUMBRAL FILAMENTS ; MAGNETOHYDRODYNAMIC SIMULATION ; SUPERSONIC DOWNFLOWS ; TRANSITION-REGION ; ORPHAN PENUMBRAE ; FLUX ROPE ; HI-C |
| 资助项目 | MOST divided by National Natural Science Foundation of China (NSFC)[12425301] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001722026100001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | MOST divided by National Natural Science Foundation of China (NSFC)[12425301] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/29064]  |
| 专题 | 云南天文台_抚仙湖太阳观测站 |
| 通讯作者 | Li, Hao |
| 作者单位 | 1.School of Earth and Space Sciences, Peking University, Beijing 100871, People’s Republic of China; 2.State Key Laboratory of Solar Activity and Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China; lihao01@nssc.ac.cn; 3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People’s Republic of China; 4.Yunnan Key Laboratory of Solar Physics and Space Science, Kunming 650216, People’s Republic of China; 5.Leibniz Institute for Astrophysics Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany; 6.State Key Laboratory of Solar Activity and Space Weather, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Qiao, Fangfang,Li, Hao,Wang, Jiasheng,et al. Fine Structure and Formation Mechanism of a Sunspot Bipolar Light Bridge in NOAA AR 13663[J]. ASTROPHYSICAL JOURNAL,2026,1000(2). |
| APA | Qiao, Fangfang,Li, Hao,Wang, Jiasheng,段雅丹,Sun, Zheng,&Li, Leping.(2026).Fine Structure and Formation Mechanism of a Sunspot Bipolar Light Bridge in NOAA AR 13663.ASTROPHYSICAL JOURNAL,1000(2). |
| MLA | Qiao, Fangfang,et al."Fine Structure and Formation Mechanism of a Sunspot Bipolar Light Bridge in NOAA AR 13663".ASTROPHYSICAL JOURNAL 1000.2(2026). |
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来源：云南天文台
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