Two Solar Tornadoes Observed with the Interface Region Imaging Spectrograph
Yang, Zihao1; Tian, Hui1; Peter, Hardi2; Su, Yang3; Samanta, Tanmoy1; Zhang, Jingwen1; Chen, Yajie1

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.

KeywordSun: corona Sun: filaments, prominences Sun: UV radiation
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000419796100006
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Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorTian, Hui
Affiliation1.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
Recommended Citation
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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