Relationship of type III radio bursts with quasi-periodic pulsations in a solar flare

Kupriyanova, E.G., Kashapova, L.K., Reid, H.A.S. and Myagkova, I.N. (2016) Relationship of type III radio bursts with quasi-periodic pulsations in a solar flare. Solar Physics, 291(11), pp. 3427-3438. (doi: 10.1007/s11207-016-0958-2)

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Abstract

We studied a solar flare with pronounced quasi-periodic pulsations detected in the microwave, X-ray, and radio bands. We used correlation, Fourier, and wavelet analyses methods to examine the temporal fine structures and relationships between the time profiles in each wave band. We found that the time profiles of the microwaves, hard X-rays, and type III radio bursts vary quasi-periodically with a common period of 40 – 50 s. The average amplitude of the variations is high, above 30 % of the background flux level, and reaches 80 % after the flare maximum. We did not find this periodicity in either the thermal X-ray flux component or in the source size dynamics. Our findings indicate that the detected periodicity is probably associated with periodic dynamics in the injection of non-thermal electrons, which can be produced by periodic modulation of magnetic reconnection.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Reid, Dr Hamish
Authors: Kupriyanova, E.G., Kashapova, L.K., Reid, H.A.S., and Myagkova, I.N.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Solar Physics
Publisher:Springer
ISSN:0038-0938
ISSN (Online):1573-093X
Published Online:10 August 2016
Copyright Holders:Copyright © 2016 Springer
First Published:First published in Solar Physics 291(11):3427-3438
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
631581Consolidated grant in solar and astrophysical plasmasLyndsay FletcherScience & Technologies Facilities Council (STFC)ST/L000741/1S&E P&A - PHYSICS & ASTRONOMY