Sunspot penumbral filaments intruding into a light bridge and the resultant reconnection jets
文献类型:期刊论文
作者 | Hou, Y. J.1,2; Li, T.1,2; Zhong, S. H.1,2; Yang, S. H.1,2; Guo, Y. L.1,2; Li, X. H.1,2; Zhang, J.1,3; Xiang YY(向永源)4 |
刊名 | Astronomy and Astrophysics |
出版日期 | 2020-10-01 |
卷号 | 642页码:14 |
ISSN号 | 0004-6361 |
关键词 | magnetic reconnection Sun: activity Sun: atmosphere Sun: magnetic fields sunspots |
DOI | 10.1051/0004-6361/202038668 |
通讯作者 | Hou, Y. J.(yijunhou@nao.cas.cn) |
产权排序 | 第4完成单位 |
文献子类 | Article |
英文摘要 | Context. Penumbral filaments and light bridges are prominent structures inside sunspots and are important for understanding the nature of sunspot magnetic fields and magneto-convection underneath. Aims. We investigate an interesting event where several penumbral filaments intrude into a sunspot light bridge. In doing so we aim to gain further insight into the magnetic fields of the sunspot penumbral filament and light bridge, as well as their interaction. Methods. Combining data from the New Vacuum Solar Telescope, Solar Dynamics Observatory, and Interface Region Imaging Spectrograph, we study the emission, kinematic, and magnetic topology characteristics of the penumbral filaments intruding into the light bridge and the resultant jets. Results. At the west part of the light bridge, the intruding penumbral filaments penetrate into the umbrae on both sides of the light bridge, and two groups of jets are also detected. The jets share the same projected morphology with the intruding filaments and are accompanied by intermittent footpoint brightenings. Simultaneous spectral imaging observations provide convincing evidence for the presences of magnetic-reconnection-related heating and bidirectional flows near the jet bases and contribute to measuring the vector velocities of the jets. Additionally, nonlinear force-free field extrapolation results reveal strong and highly inclined magnetic fields along the intruding penumbral filaments, highly consistent with the results deduced from the vector velocities of the jets. Therefore, we propose that the jets could be caused by magnetic reconnections between emerging fields within the light bridge and the nearly horizontal fields of intruding filaments. The jets are then ejected outward along the stronger filament fields. Conclusions. Our study indicates that magnetic reconnection could occur between the penumbral filament fields and emerging fields within the light bridge and produce jets along the stronger filament fields. These results further complement the study of magnetic reconnection and dynamic activities within the sunspot. |
学科主题 | 天文学 ; 太阳与太阳系 ; 太阳物理学 |
URL标识 | 查看原文 |
出版地 | 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE |
WOS关键词 | SOLAR MAGNETIC FEATURES ; DARK-CORED FILAMENTS ; FINE-STRUCTURE ; HIGH-RESOLUTION ; UMBRAL DOTS ; FIELDS ; MAGNETOCONVECTION ; RECONSTRUCTION ; FLUX |
资助项目 | European Space Agency ; Norwegian Space Centre ; National Key R&D Program of China[2019YFA0405000] ; National Natural Science Foundation of China (NSFC)[11533008] ; National Natural Science Foundation of China (NSFC)[11903050] ; National Natural Science Foundation of China (NSFC)[11773039] ; National Natural Science Foundation of China (NSFC)[11790304] ; National Natural Science Foundation of China (NSFC)[11873059] ; National Natural Science Foundation of China (NSFC)[11673035] ; National Natural Science Foundation of China (NSFC)[11673034] ; National Natural Science Foundation of China (NSFC)[11790300] ; Chinese Academy of Sciences[XDB41000000] ; AOC Nebula Talents Program ; Youth Innovation Promotion Association of CAS ; Young Elite Scientists Sponsorship Program by CAST[2018QNRC001] ; Chinese Academy of Sciences[QYZDJ-SSW-SLH050] |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | EDP SCIENCES S A |
WOS记录号 | WOS:000577102500006 |
资助机构 | European Space Agency ; Norwegian Space Centre ; National Key R&D Program of China[2019YFA0405000] ; National Natural Science Foundation of China (NSFC)[11533008, 11903050, 11773039, 11790304, 11873059, 11673035, 11673034, 11790300] ; Chinese Academy of Sciences[XDB41000000] ; AOC Nebula Talents Program ; Youth Innovation Promotion Association of CAS ; Young Elite Scientists Sponsorship Program by CAST[2018QNRC001] ; Chinese Academy of Sciences[QYZDJ-SSW-SLH050] |
源URL | [http://ir.ynao.ac.cn/handle/114a53/23737] |
专题 | 云南天文台_抚仙湖太阳观测站 |
通讯作者 | Hou, Y. J. |
作者单位 | 1.Cas Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100101, China 2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, 100049, China 3.School of Physics and Materials Science, Anhui University, Hefei, 230601, China 4.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650011, China |
推荐引用方式 GB/T 7714 | Hou, Y. J.,Li, T.,Zhong, S. H.,et al. Sunspot penumbral filaments intruding into a light bridge and the resultant reconnection jets[J]. Astronomy and Astrophysics,2020,642:14. |
APA | Hou, Y. J..,Li, T..,Zhong, S. H..,Yang, S. H..,Guo, Y. L..,...&Xiang YY.(2020).Sunspot penumbral filaments intruding into a light bridge and the resultant reconnection jets.Astronomy and Astrophysics,642,14. |
MLA | Hou, Y. J.,et al."Sunspot penumbral filaments intruding into a light bridge and the resultant reconnection jets".Astronomy and Astrophysics 642(2020):14. |
入库方式: OAI收割
来源:云南天文台
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