A1 Refereed original research article in a scientific journal
Repeated Type III Burst Groups Associated with a B-Class Flare and a Narrow-Width CME
Authors: Pohjolainen Silja, Mckay Derek, Sheshvan Nasrin Talebpour, Monstein Christian
Publisher: Springer Dordrecht
Publication year: 2023
Journal: Solar Physics
Journal name in source: SOLAR PHYSICS
Journal acronym: SOL PHYS
Article number: 118
Volume: 298
Number of pages: 15
ISSN: 0038-0938
DOI: https://doi.org/10.1007/s11207-023-02212-8
Web address : https://doi.org/10.1007/s11207-023-02212-8
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/181459275
We have analysed a solar event from 27 September 2021, which included a small GOES B-class flare, a compact and narrow-width CME, and radio type III bursts that appeared in groups. The long-duration, repeated metric type III burst emission indicates continuous electron acceleration at high altitudes. The flaring active region was surrounded by strong magnetic fields and large-scale loops, which guided the outflow of the CME plasmoid and hence the narrow, bullet-like appearance of the CME. Radio imaging and EUV observations confirmed the direction of particle propagation and the depletion of matter from the solar source region. We observed V-shaped type III burst emission lanes, which also explain the field configuration and suggest a possible location for repeated reconnection that occurred at a constant altitude.
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