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Peculiar microwave quasi-periodic pulsations with zigzag pattern in a CME-related Flare on 2005-01-15

Published online by Cambridge University Press:  18 July 2013

Baolin Tan
Baolin Tan*
Affiliation:
Key Laboratory of Solar Activity, National Astronomical Observatories of the Chinese Academy of Sciences, Beijing 100012, China. email: bltan@nao.cas.cn
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Abstract

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A microwave quasi-periodic pulsation with zigzag pattern (Z-QPP) in a solar flare on 2005-01-15 is observed by the Chinese Solar Broadband Spectrometer in Huairou (SBRS/Huairou) at 1.10-1.34 GHz. The zigzag pulsation occurred just in the early rising phase of the flare with weakly right-handed circular polarization. Its period is only several decades millisecond. Particularly, before and after the pulsation, there are many spectral fine structures, such as zebra patterns, fibers, and millisecond spikes. The microwave Z-QPP can provide some kinematic information of the source region in the early rising phase of the flare, and the source width changes from ~1000 km to 3300 km, even if we have no imaging observations. The abundant spectral fine structures possibly reflect the dynamic features of non-thermal particles.

Keywords

solar flaremicrowave burstsfine structures
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S294: Solar and Astrophysical Dynamos and Magnetic Activity , August 2012 , pp. 577 - 578
Copyright
Copyright © International Astronomical Union 2013 

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