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Quasi-periodic wiggles of microwave zebra structures in a solar flare
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Yu, Sijie, Nakariakov, V. M. (Valery M.), Selzer, Luke A., Tan, Baolin and Yan, Yihua (2013) Quasi-periodic wiggles of microwave zebra structures in a solar flare. Astrophysical Journal, Volume 777 (Number 2). Article 159. doi:10.1088/0004-637X/777/2/159 ISSN 0004-637X.
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Official URL: http://dx.doi.org/10.1088/0004-637X/777/2/159
Abstract
Quasi-periodic wiggles of microwave zebra pattern (ZP) structures with periods ranging from about 0.5 s to 1.5 s are found in an X-class solar flare on 2006 December 13 at the 2.6-3.8 GHz with the Chinese Solar Broadband Radio Spectrometer (SBRS/Huairou). Periodogram and correlation analysis show that the wiggles have two to three significant periodicities and are almost in phase between stripes at different frequencies. The Alfvén speed estimated from the ZP structures is about 700 km s–1. We find the spatial size of the wave-guiding plasma structure to be about 1 Mm with a detected period of about 1 s. This suggests that the ZP wiggles can be associated with the fast magnetoacoustic oscillations in the flaring active region. The lack of a significant phase shift between wiggles of different stripes suggests that the ZP wiggles are caused by a standing sausage oscillation.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Astrophysical Journal | ||||
Publisher: | IOP Publishing | ||||
ISSN: | 0004-637X | ||||
Official Date: | 10 November 2013 | ||||
Dates: |
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Volume: | Volume 777 | ||||
Number: | Number 2 | ||||
Page Range: | Article 159 | ||||
DOI: | 10.1088/0004-637X/777/2/159 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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