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Dynamics of granules and intergranular lanes at the base of Hα jets

文献类型：期刊论文

作者Qi, Youqian5; Huang, Zhenghua5; Xia, Lidong5; Fu, Hui5; Liu, Jiajia4,6; Xie, Quan4,6; Bi Y(毕以)1,3; Guo, Mingzhe2,5
刊名ASTRONOMY & ASTROPHYSICS
出版日期2025-11
卷号703
关键词Sun: chromosphere Sun: granulation
ISSN号0004-6361
DOI10.1051/0004-6361/202556245
产权排序第4完成单位
文献子类Article
英文摘要Aims. Using observations taken by the New Vacuum Solar Telescope at the H alpha +/- 0.8 & Aring; passbands and TiO 7058 & Aring; passband, we investigate the photospheric dynamics at the bases of 85 H alpha jets. Methods. By applying the Fourier local correlation tracking algorithm on the TiO data, we find that the horizontal velocities increase significantly at the bases of an H alpha jet during its appearance, and the statistics for these H alpha jets at their bases gives an average of 1.50 km s(-1) with a sigma of 0.64 km s(-1), which is about 25% greater than the typical value of the granules. We find that the intergranular lanes at the bases of H alpha jets are expanding, with an expansion rate up to 300%. With the automated swirl detection algorithm, we find that the occurrence rate of photospheric swirls in the region abundant in H alpha jets is 2.0 x 10(-5) Mm(-2) s(-1), significantly larger than 1.4 x 10(-5) Mm(-2) s(-1) obtained in the rest of the studied field of view. Results. In the region abundant in H alpha jets, 61.2% of swirls are expanding. By contrast, in the rest of the field of view, only 52.3% of swirls are expanding. Although a definitive one-to-one relationship among H alpha jets, dynamics of granules and intergranules, and swirls remains challenging, a case study shows that the appearance of an H alpha jet is apparently associated with the occurrence and rotation of a swirl and the expansion of the intergranular lane, while the disappearance of the jet is accompanied by the contraction of the intergranular lane. Conclusions. Based on our statistical analyses, we suggest that higher horizontal velocity sweeps more small magnetic elements into network lanes, leading to stronger magnetic activity and consequently the expansion of intergranular lanes and swirls, which in turn further drives H alpha jets in the chromosphere.
学科主题天文学 ; 太阳与太阳系
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HIGH-RESOLUTION OBSERVATIONS ; SOLAR CHROMOSPHERIC JETS ; VORTEX FLOWS ; QUIET-SUN ; MAGNETIC ELEMENTS ; DRIVEN ; SIMULATIONS ; SPICULES ; EMERGENCE ; ADVECTION
资助项目National Natural Science Foundation of China[12203030]; National Key R&D Program of China[2021YFA0718600]; Shandong Province Natural Science Foundation[ZR2023QD14]; Strategic Priority Research Program of the Chinese Academy of Science[XDB0560000]; National Natural Science Foundation[NSFC 42188101]; National Natural Science Foundation[12373056]; National Science Foundation of China[12273106]; CAS Light of West China Program; Taishan Scholars Program Special Fund[tsqn202408051]; Shandong Provincial Natural Science Foundation for Excellent Young Scientists Program (Overseas)[2025HWYQ-019]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001620697200015
出版者EDP SCIENCES S A
资助机构National Natural Science Foundation of China[12203030] ; National Key R&D Program of China[2021YFA0718600] ; Shandong Province Natural Science Foundation[ZR2023QD14] ; Strategic Priority Research Program of the Chinese Academy of Science[XDB0560000] ; National Natural Science Foundation[NSFC 42188101, 12373056] ; National Science Foundation of China[12273106] ; CAS Light of West China Program ; Taishan Scholars Program Special Fund[tsqn202408051] ; Shandong Provincial Natural Science Foundation for Excellent Young Scientists Program (Overseas)[2025HWYQ-019]
源URL[http://ir.ynao.ac.cn/handle/114a53/28746]  
专题云南天文台_抚仙湖太阳观测站
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, China;
2.Center for Integrated Research on Space Science, Astronomy, and Physics, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, 266237, China
3.Yunnan Key Laboratory of Solar Physics and Space Science, 396 Yangfangwang, Guandu District, Kunming, 650216, China;
4.National Key Laboratory of Deep Space Exploration, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, China;
5.Shandong Key Laboratory of Space Environment and Exploration Technology, Institute of Space Sciences, Shandong University, Shandong, China;
6.CAS Center for Excellence in Comparative Planetology, CAS Key Laboratory of Geospace Environment, Mengcheng National Geophysical Observatory, University of Science and Technology of China, Hefei, 230026, China;
推荐引用方式
GB/T 7714		 Qi, Youqian,Huang, Zhenghua,Xia, Lidong,et al. Dynamics of granules and intergranular lanes at the base of Hα jets[J]. ASTRONOMY & ASTROPHYSICS,2025,703.
APA Qi, Youqian.,Huang, Zhenghua.,Xia, Lidong.,Fu, Hui.,Liu, Jiajia.,...&Guo, Mingzhe.(2025).Dynamics of granules and intergranular lanes at the base of Hα jets.ASTRONOMY & ASTROPHYSICS,703.
MLA Qi, Youqian,et al."Dynamics of granules and intergranular lanes at the base of Hα jets".ASTRONOMY & ASTROPHYSICS 703(2025).

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