Two Solar Tornadoes Observed with the Interface Region Imaging Spectrograph | |
Yang, Zihao1; Tian, Hui1; Peter, Hardi2; Su, Yang3![]() | |
刊名 | ASTROPHYSICAL JOURNAL
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2018-01-10 | |
卷号 | 852期号:2页码:12 |
关键词 | Sun: corona Sun: filaments, prominences Sun: UV radiation |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/aa9e04 |
英文摘要 | The barbs or legs of some prominences show an apparent motion of rotation, which are often termed solar tornadoes. It is under debate whether the apparent motion is a real rotating motion, or caused by oscillations or counter-streaming flows. We present analysis results from spectroscopic observations of two tornadoes by the Interface Region Imaging Spectrograph. Each tornado was observed for more than 2.5 hr. Doppler velocities are derived through a single Gaussian fit to the Mg II k 2796 angstrom and Si IV 1393 angstrom. line profiles. We find coherent and stable redshifts and blueshifts adjacent to each other across the tornado axes, which appears to favor the interpretation of these tornadoes as rotating cool plasmas with temperatures of 10(4) K-10(5) K. This interpretation is further supported by simultaneous observations of the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory, which reveal periodic motions of dark structures in the tornadoes. Our results demonstrate that spectroscopic observations can provide key information to disentangle different physical processes in solar prominences. |
WOS关键词 | SPECTROMETER ; PROMINENCES |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000419796100006 |
内容类型 | 期刊论文 |
源URL | [http://libir.pmo.ac.cn/handle/332002/22178] ![]() |
专题 | 中国科学院紫金山天文台 |
通讯作者 | Tian, Hui |
作者单位 | 1.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China 2.Max Planck Inst Solar Syst Res, Justus von Liebig Weg 3, D-37077 Gottingen, Germany 3.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Yang, Zihao,Tian, Hui,Peter, Hardi,et al. Two Solar Tornadoes Observed with the Interface Region Imaging Spectrograph[J]. ASTROPHYSICAL JOURNAL,2018,852(2):12. |
APA | Yang, Zihao.,Tian, Hui.,Peter, Hardi.,Su, Yang.,Samanta, Tanmoy.,...&Chen, Yajie.(2018).Two Solar Tornadoes Observed with the Interface Region Imaging Spectrograph.ASTROPHYSICAL JOURNAL,852(2),12. |
MLA | Yang, Zihao,et al."Two Solar Tornadoes Observed with the Interface Region Imaging Spectrograph".ASTROPHYSICAL JOURNAL 852.2(2018):12. |
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