Repeated Type III Burst Groups Associated with a B-Class Flare and a Narrow-Width CME
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2023-10
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en
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Solar Physics, Volume 298, issue 10
Abstract
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.Description
Funding Information: We thank the radio monitoring service at LESIA, Observatoire de Paris for providing value-added data that have been used for this study. We also thank the e-Callisto community for free access to their data and software. Our special thanks go to Kim Tolbert at GSFC, who prepared the Fermi/GBM response file manually for us, as the flare was not big enough for the quicklook procedure. KAIRA was funded by the University of Oulu and the FP7 European Regional Development Fund and is operated by the Sodankylä Geophysical Observatory with assistance from the University of Tromsø and volunteer effort. The CME catalog is generated and maintained at the CDAW Data Center by NASA and the Catholic University of America in cooperation with the Naval Research Laboratory. SOHO is a project of international cooperation between ESA and NASA. Funding Information: We thank the radio monitoring service at LESIA, Observatoire de Paris for providing value-added data that have been used for this study. We also thank the e-Callisto community for free access to their data and software. Our special thanks go to Kim Tolbert at GSFC, who prepared the Fermi /GBM response file manually for us, as the flare was not big enough for the quicklook procedure. KAIRA was funded by the University of Oulu and the FP7 European Regional Development Fund and is operated by the Sodankylä Geophysical Observatory with assistance from the University of Tromsø and volunteer effort. The CME catalog is generated and maintained at the CDAW Data Center by NASA and the Catholic University of America in cooperation with the Naval Research Laboratory. SOHO is a project of international cooperation between ESA and NASA. Publisher Copyright: © 2023, The Author(s).
Keywords
Association with flares, Corona, Coronal mass ejections, Dynamics, Flares, Initiation and propagation, Magnetic fields, Radio bursts
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Citation
Pohjolainen , S , McKay , D , Talebpour Sheshvan , N & Monstein , C 2023 , ' Repeated Type III Burst Groups Associated with a B-Class Flare and a Narrow-Width CME ' , Solar Physics , vol. 298 , no. 10 , 118 . https://doi.org/10.1007/s11207-023-02212-8