Position of the Energetic Electron Trapping Boundary Relative to Auroral Oval Boundaries during the Magnetic Storm on December 19–22, 2015, Based on Data from the Meteor-M2 Satellite
- Авторы: Sotnikov N.V.1, Antonova E.E.1,2, Ryazantseva M.O.2, Barinova V.O.1, Rubinshtein I.A.1, Mit’ S.K.1
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Учреждения:
- Institute of Nuclear Physics, Moscow State University
- Space Research Institute, Russian Academy of Sciences
- Выпуск: Том 59, № 2 (2019)
- Страницы: 136-146
- Раздел: Article
- URL: https://journals.rcsi.science/0016-7932/article/view/157428
- DOI: https://doi.org/10.1134/S0016793219020142
- ID: 157428
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Аннотация
This paper studies the position of the trapping boundary of electrons with energies of >100 keV relative to the equatorial boundary of the auroral oval during a large magnetic storm on December 19–22, 2015, with a minimum Dst of –170 nT as measured by the Meteor-M2–1 satellite. Energetic electrons with energies from 0.1 to 13 MeV and fluxes of low-energy electrons with energies from 0.13 to 16.64 keV have been measured. It is taken into account that the pitch-angle distribution of energetic electrons near the trapping boundary is almost isotropic. It is shown that the energetic electron trapping boundary during the considered storm is detected inside the auroral oval or near its polar boundary. The distance along the geomagnetic latitude between the energetic electron trapping boundary and the equatorial boundary of the auroral oval is determined. The dependence of this distance on time for crossings of the oval before and after midnight is analyzed. It is shown that the distance between the trapping boundary and the equatorial boundary of the oval during the storm decreases after midnight and increases before midnight. These values are almost equal near minimum Dst. The significance of the results obtained for a description of changes in the magnetospheric topology during magnetic storms is discussed.
Об авторах
N. Sotnikov
Institute of Nuclear Physics, Moscow State University
Автор, ответственный за переписку.
Email: sotnikov.nikita@hotmail.com
Россия, Moscow
E. Antonova
Institute of Nuclear Physics, Moscow State University; Space Research Institute, Russian Academy of Sciences
Автор, ответственный за переписку.
Email: elizaveta.antonova@gmail.com
Россия, Moscow; Moscow
M. Ryazantseva
Space Research Institute, Russian Academy of Sciences
Email: elizaveta.antonova@gmail.com
Россия, Moscow
V. Barinova
Institute of Nuclear Physics, Moscow State University
Email: elizaveta.antonova@gmail.com
Россия, Moscow
I. Rubinshtein
Institute of Nuclear Physics, Moscow State University
Email: elizaveta.antonova@gmail.com
Россия, Moscow
S. Mit’
Institute of Nuclear Physics, Moscow State University
Email: elizaveta.antonova@gmail.com
Россия, Moscow
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