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On the Question of Localizing the Birthplaces of Coronal Mass Ejections on the Sun

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Abstract

The localization of zones of occurrence of coronal mass ejections (CME) on the Sun in the period from November 2006 to February 2007 was studied according to the SOHO catalogue. A method for comparing such zones with active regions (ARs) on both the visible and invisible hemispheres of the Sun is described. It is shown that a simple linear continuation of the projections of the CME trajectory on the Sun in many cases passes by the AR. It was possible to link 63.5% of CMEs to the ARs, 19% failed, and for 17.5% a choice must be made between the AR and flare sites, where spots were observed 1–3 solar revolutions earlier. The hypothesis is discussed that the displacement of the beginning of the CME trajectory from the AR centroid is associated with the asymmetry of the location of the magnetic rope, on the basis of which the CME is formed, relative to the AR: one base of the rope is located near the strong magnetic fields of the sunspots, the second one is in the region of weak fields on the periphery or outside the AR.

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ACKNOWLEDGMENTS

The authors are grateful to M.Yu. Savinkin for the opportunity to use the author’s computer program [20].

Funding

The work was supported by the project “Astrophysical Complex MSU-ISU”, agreement EB-075-15-2021-675 of the Ministry of Science and Higher Education of the Russian Federation (projects FZZE-2023-0004, FZZE-2020-0017, FZZE-2020-0024).

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Authors and Affiliations

  1. Irkutsk State University, Irkutsk, Russia

    S. A. Yazev

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

    S. A. Yazev & V. M. Tomozov

Authors
  1. S. A. Yazev
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  2. V. M. Tomozov
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Correspondence to S. A. Yazev.

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Translated by T. Sokolova

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Yazev, S.A., Tomozov, V.M. On the Question of Localizing the Birthplaces of Coronal Mass Ejections on the Sun. Astron. Rep. 67, 1205–1215 (2023). https://doi.org/10.1134/S1063772923100086

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  • DOI: https://doi.org/10.1134/S1063772923100086

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