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Solar Gamma-Ray Flares and Activity Complexes

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Abstract

Strong flare events with an extended phase of gamma ray emission from the catalog by Share et al. have been analyzed in order to explain the characteristics of the impulsive and extended phases of such flares and reveal their connection with activity complexes and coronal holes. It is shown that 74% of such events are closely related to activity complexes. It has been qualitatively demonstrated that the particle acceleration processes during the flare development are associated with the changes in the magnetic topology of the flare region and the evolution of the coronal mass ejection. The possible relation of coronal holes to activity complexes and the role of “exchange” reconnection in these processes are discussed.

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ACKNOWLEDGMENTS

The authors are grateful to the reviewer for valuable and helpful comments, which were considered in the final version of the paper.

Funding

This study was supported in part by the project FZZE-2020-0017 of the Ministry of Science and Higher Education of the Russian Federation, as well as by project II.16.3.1 of the Institute of Solar–Terrestrial Physics, Siberian Branch of the Russian Academy of Sciences.

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Authors and Affiliations

  1. Institute of Solar–Terrestrial Physics, Siberian Branch, Russian Academy of Sciences, Irkutsk, Russia

    V. M. Tomozov, S. A. Yazev & E. S. Isaeva

  2. Irkutsk State University, Irkutsk, Russia

    S. A. Yazev & E. S. Isaeva

Authors
  1. V. M. Tomozov
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  2. S. A. Yazev
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  3. E. S. Isaeva
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Corresponding author

Correspondence to S. A. Yazev.

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Translated by M. Chubarova

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Tomozov, V.M., Yazev, S.A. & Isaeva, E.S. Solar Gamma-Ray Flares and Activity Complexes. Astron. Rep. 64, 722–730 (2020). https://doi.org/10.1134/S1063772920090073

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  • DOI: https://doi.org/10.1134/S1063772920090073

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