Quasi-periodic wiggles of microwave zebra structures in a solar flare

Sijie Yu, V. M. Nakariakov, L. A. Selzer, Baolin Tan, Yihua Yan

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

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.

Original languageEnglish (US)
Article number159
JournalAstrophysical Journal
Volume777
Issue number2
DOIs
StatePublished - Nov 10 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Sun: flares
  • Sun: oscillations
  • Sun: radio radiation

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