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Small Ground-Level Enhancement of 6 January 2014: Acceleration by CME-Driven Shock?статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Scopus,
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 17 мая 2016 г.
- Авторы: Li C., Miroshnichenko L.I., Sdobnov V.E.
- Журнал: Solar Physics
- Том: 291
- Год издания: 2016
- Издательство: Springer Netherlands
- Местоположение издательства: Dordrecht, Netherlands
- Первая страница: 975
- Последняя страница: 987
- DOI: 10.1007/s11207-016-0871-8
- Аннотация: Abstract. Available spectral data for solar energetic particles (SEPs) measured near the Earth’s orbit (GOES-13) and on the terrestrial surface (polar neutron monitors) on 6 January 2014 are analyzed. A feature of this solar proton event (SPE) and weak ground-level enhancement (GLE) is that the source was located behind the limb. For the purpose of comparison, we also use the Advanced Composition Explorer (ACE) data on sub-relativistic electrons and GOES-13 measurements of a strong and extended proton event on 8 – 9 January 2014. It was found that the surface observations at energies >433 MeV and GOES-13 data at >30 –>700 MeV may be satisfactorily reconciled by a power-law time-of-maximum (TOM) spectrum with a characteristic exponential tail (cutoff). Some methodological difficulties of spectrum determination are discussed. Assuming that the TOM spectrum near the Earth is a proxy of the spectrum of accelerated particles in the source, we critically consider the possibility of shock acceleration to relativistic energies in the solar corona. Finally, it is suggested to interpret the observational features of this GLE under the assumption that small GLEs may be produced by shocks driven by coronal mass ejections. However, the serious limitations of such an approach to the problem of the SCR spectrum prevent drawing firm conclusions in this controversial field.
- Добавил в систему: Мирошниченко Леонтий Иванович