B1 Non-refereed article in a scientific journal
The long period of 3He-rich solar energetic particles measured by Solar Orbiter 2020 November 17–23
Authors: Bucik R, Mason GM, Gomez-Herrero R, Lario D, Balmaceda L, Nitta NV, Krupar V, Dresing Nina, Ho GC, Allen RC, Carcaboso F, Rodriguez-Pacheco J, Schuller F, Warmuth A, Wimmer-Schweingruber RF, von Forstner JLF, Andrews GB, Berger L, Cernuda I, Lara FE, Lees WJ, Martin C, Pacheco D, Prieto M, Sanchez-Prieto S, Schlemm CE, Seifert H, Tyagi K, Maksimovic M, Vecchio A, Kollhoff A, Kuhl P, Xu ZG, Eldrum S
Publisher: EDP SCIENCES S A
Publication year: 2021
Journal: Astronomy and Astrophysics
Journal acronym: ASTRON ASTROPHYS
Article number: ARTN L11
Volume: 656
Number of pages: 7
ISSN: 0004-6361
eISSN: 1432-0746
DOI: https://doi.org/10.1051/0004-6361/202141009
Web address : https://www.aanda.org/articles/aa/full_html/2021/12/aa41009-21/aa41009-21.html
Self-archived copy’s web address: https://arxiv.org/abs/2109.05570
We report observations of a relatively long period of He-3-rich solar energetic particles (SEPs) measured by Solar Orbiter. The period consists of several well-resolved ion injections. The high-resolution STEREO-A imaging observations reveal that the injections coincide with extreme ultraviolet jets and brightenings near the east limb, not far from the nominal magnetic connection of Solar Orbiter. The jets originated in two adjacent, large, and complex active regions, as observed by the Solar Dynamics Observatory when the regions rotated into the Earth's view. It appears that the sustained ion injections were related to the complex configuration of the sunspot group and the long period of He-3-rich SEPs to the longitudinal extent covered by the group during the analyzed time period.
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