The Solar Eruption of 2017 September 10: Wavy with a Chance of Protons

High-resolution SUVI images reveal an interesting new picture of particle acceleration in powerful solar eruptions. Typically, powerful solar eruptions include a coronal wave component, as well the traditional CME and flare components. At low solar altitudes, coronal waves refract downward, toward t...

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Bibliographic Details
Published in:The Astrophysical journal 2022-01, Vol.924 (2), p.106
Main Authors: de Koning, Curt A., Pizzo, V. J., Seaton, Daniel B.
Format: Article
Language:English
Subjects:
Astrophysics
Corona
Coronal waves
Eruptions
Image resolution
Particle acceleration
Particle physics
Protons
Refracted waves
Relativistic effects
Relativistic particles
Shock waves
Solar corona
Solar coronal waves
Solar particle emission
Solar storm
Solar surface
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Summary:High-resolution SUVI images reveal an interesting new picture of particle acceleration in powerful solar eruptions. Typically, powerful solar eruptions include a coronal wave component, as well the traditional CME and flare components. At low solar altitudes, coronal waves refract downward, toward the solar surface, because of the slower Alfvén speeds at the base of the corona. The refracted wave plus the shock wave ahead of an intense CME allow for a two-step shock acceleration process that can result in relativistic or GLE particles. This mechanism may be particularly applicable to the first-to-arrive, prompt relativistic particles measured by the Fort Smith neutron monitor during GLE # 72 on 2017 September 10.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/ac374d