Granular-scale Magnetic Flux Emergence and its Associated Features in an Emerging Active Region
文献类型：期刊论文
| 作者 | Shen, Jinhua2,3,4 ; Xu, Zhi1; Li, Jianping2; Ji, Haisheng2
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2022 |
| 卷号 | 925期号:1页码:10 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ac37c3 |
| 通讯作者 | Shen, Jinhua(shenjh@xao.ac.cn) |
| 英文摘要 | Using the high-resolution photosphere and chromosphere observations made by the 1 m New Vacuum Solar Telescope, we studied the granular-scale magnetic flux emergence occurring in emerging active region NOAA 12579. Supplementary observations are also provided by the spacecraft Solar Dynamics Observatory. The studied granular-scale flux emergence took place at two different locations. One is completely embedded in the unipolar region of the following sunspots (Case 1), while another is located at the central part in the active region (Case 2). We find that both cases initially emerge from a dark patch like a wide intergranular lane, but showing the different subsequent features. In Case 1, the emerging granule grows in an elongated feature and reaches its maximum size of almost of 5 '' x 3 '', with an elongated speed of about 2-3 km s(-1). An eruption (i.e., surge) with bright footpoints is observed after the emerging granule reaches its maximum scale. There is a time delay of more than 10 minutes between the appearance of the abnormal granule and the H alpha surge. Furthermore, its footpoints are clearly rooted at the intergranular lane. We propose that the eruptive surge could be triggered by the reconnection between the emerging magnetic flux and the preexisting ambient field, leading to the localized heating and bidirectional flows. In Case 2, the granular cell emerging is simultaneously associated with bright points with opposite magnetic polarity, showing the separating motion between them and a bunch of newly formed arch filament systems. We infer that the bright points are due to the strong-field magnetic concentration in the dark intergranular lanes rather than the instantaneous Ellerman bombs. |
| WOS关键词 | HIGH-RESOLUTION OBSERVATIONS ; X-RAY JETS ; SOLAR TELESCOPE ; ALFVEN WAVES ; RECONNECTION ; HINODE |
| 资助项目 | West Young Scholars Programs Chinese Academy of Sciences (CAS)[2017XBQNXZ-A-007] ; NSFC[11773061] ; NSFC[10790302] ; NSFC[10428309] ; NSFC[12173076] ; NSFC[11873091] ; Nanjing University, Key Lab Modern Astron and Astrophysics of CAS Key Lab of Solar Activity, NOAC[KLSA 202106] ; Key Lab for DMSA, CAS[2019FA001] ; Maintenance and Upgrading Fund of CAS for Astronomical Telescopes and Facility Instruments |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000746169300001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | West Young Scholars Programs Chinese Academy of Sciences (CAS) ; NSFC ; Nanjing University, Key Lab Modern Astron and Astrophysics of CAS Key Lab of Solar Activity, NOAC ; Key Lab for DMSA, CAS ; Maintenance and Upgrading Fund of CAS for Astronomical Telescopes and Facility Instruments |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4450]  |
| 专题 | 太阳物理研究室_太阳物理研究团组 |
| 通讯作者 | Shen, Jinhua |
| 作者单位 | 1.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China 2.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Nanjing 210023, Peoples R China 3.NAO, CAS Key Lab Solar Act, Beijing 100101, Peoples R China 4.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shen, Jinhua,Xu, Zhi,Li, Jianping,et al. Granular-scale Magnetic Flux Emergence and its Associated Features in an Emerging Active Region[J]. ASTROPHYSICAL JOURNAL,2022,925(1):10. |
| APA | Shen, Jinhua,Xu, Zhi,Li, Jianping,&Ji, Haisheng.(2022).Granular-scale Magnetic Flux Emergence and its Associated Features in an Emerging Active Region.ASTROPHYSICAL JOURNAL,925(1),10. |
| MLA | Shen, Jinhua,et al."Granular-scale Magnetic Flux Emergence and its Associated Features in an Emerging Active Region".ASTROPHYSICAL JOURNAL 925.1(2022):10. |
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来源：新疆天文台
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