English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Two Solar Tornadoes Observed with the Interface Region Imaging Spectrograph

Yang, Z., Tian, H., Peter, H., Su, Y., Samanta, T., Zhang, J., et al. (2018). Two Solar Tornadoes Observed with the Interface Region Imaging Spectrograph. The Astrophysical Journal, 852(2): 79. doi:10.3847/1538-4357/aa9e04.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0003-3254-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-3255-5
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Yang, Zihao, Author
Tian, Hui, Author
Peter, Hardi1, Author              
Su, Yang, Author
Samanta, Tanmoy, Author
Zhang, Jingwen, Author
Chen, Yajie, Author
Affiliations:
1Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832289              

Content

show
hide
Free keywords: Sun: corona; Sun: filaments, prominences; Sun: UV radiation
 Abstract: 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 Å and Si iv 1393 Å 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 104 K–105 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.

Details

show
hide
Language(s): eng - English
 Dates: 2019-03-192018
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.3847/1538-4357/aa9e04
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: The Astrophysical Journal
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Bristol; Vienna : IOP Publishing; IAEA
Pages: - Volume / Issue: 852 (2) Sequence Number: 79 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215_3