KMS of Xinjiang Astronomical Observatory, CAS
| High-resolution Spectroscopic Imaging of Counter-streaming Motions in Solar Active Region Magnetic Loops | |
Yang, Xu1; Cao, Wenda1,2; Ji, Haisheng3,4; Hashim, Parida5,6 ; Shen, Jinhua5
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| 2019-08-10 | |
| Source Publication | ASTROPHYSICAL JOURNAL LETTERS
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| ISSN | 2041-8205 |
| Volume | 881Issue:1Pages:L25 |
| Contribution Rank | 5 |
| Abstract | We carried out high-resolution spectroscopic imaging in He I 10830 angstrom and H-alpha for a set of active region (NOAA 12569) magnetic loops of different sizes (classified into short and long loops) with the Goode Solar Telescope at the Big Bear Solar Observatory on 2016 July 18. The long loops take the form of an chromospheric arch filament system, yet their extreme ultraviolet (EUV) counterparts are observed by the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory. Animations of blue- and red-wing images give counter-streaming motions; i.e., chromospheric absorption features in blue- and red-wing images move in opposite directions at different strands. The moving pattern is detected with the local correlation tracking method and confirmed by Doppler shifts. We speculate that, combined with the results of wavelet analysis that gives obvious 4 minute oscillation along trailing polarity, counter-streaming motions for short loops could be powered by p-mode leakage. However, for counter-streaming motions in long loops, we show that unidirectional mass flows in two opposite directions are accompanied with simultaneous weak EUV brightenings. Heating processes, probably by magnetic reconnection at footpoints, may have occurred. In addition, plasma flows along the magnetic loops, tracked with absorption features in He I 10830 angstrom, are found to be ejected from and drained out into inter-granule lane areas at different ends of the loop system. |
| Keyword | Sun: chromosphere Sun: corona Sun: granulation Sun: photosphere |
| DOI | 10.3847/2041-8213/ab365b |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | FIELD |
| Funding Project | Korea Astronomy and Space Science Institute ; CNFC[11790300] ; CNFC[11729301] ; CNFC[11773061] ; US NSF[AGS-1821294] ; New Jersey Institute of Technology ; Seoul National University |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000481702600002 |
| Publisher | IOP PUBLISHING LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/2931 |
| Collection | 太阳物理研究团组 |
| Corresponding Author | Yang, Xu |
| Affiliation | 1.New Jersey Inst Technol, Ctr Solar Terr Res, 323 Martin Luther King Blvd, Newark, NJ 07102 USA 2.New Jersey Inst Technol, Big Bear Solar Observ, Big Bear City, CA 92314 USA 3.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Sci, Nanjing 210008, Jiangsu, Peoples R China 4.China Three Gorges Univ, Yichang 443002, Peoples R China 5.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 6.Univ Chinese Acad Sci, Beijing, Peoples R China |
| Recommended Citation GB/T 7714 | Yang, Xu,Cao, Wenda,Ji, Haisheng,et al. High-resolution Spectroscopic Imaging of Counter-streaming Motions in Solar Active Region Magnetic Loops[J]. ASTROPHYSICAL JOURNAL LETTERS,2019,881(1):L25. |
| APA | Yang, Xu,Cao, Wenda,Ji, Haisheng,Hashim, Parida,&Shen, Jinhua.(2019).High-resolution Spectroscopic Imaging of Counter-streaming Motions in Solar Active Region Magnetic Loops.ASTROPHYSICAL JOURNAL LETTERS,881(1),L25. |
| MLA | Yang, Xu,et al."High-resolution Spectroscopic Imaging of Counter-streaming Motions in Solar Active Region Magnetic Loops".ASTROPHYSICAL JOURNAL LETTERS 881.1(2019):L25. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Yan-2019-Periodic Q-（1078KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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