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  3He-rich Solar Energetic Particles in Helical Jets on the Sun

Bučík, R., Innes, D., Mason, G. M., Wiedenbeck, M. E., Gómez-Herrero, R., & Nitta, N. V. (2018). 3He-rich Solar Energetic Particles in Helical Jets on the Sun. The Astrophysical Journal, 852: 76. doi:10.3847/1538-4357/aa9d8f.

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Genre: Journal Article

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 Creators:
Bučík, Radoslav1, Author              
Innes, Davina1, Author              
Mason, Glenn M., Author
Wiedenbeck, Mark E., Author
Gómez-Herrero, Raúl, Author
Nitta, Nariaki V., Author
Affiliations:
1Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832289              

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 Abstract: Particle acceleration in stellar flares is ubiquitous in the universe; however, our Sun is the only astrophysical object where energetic particles and their source flares can both be observed. The acceleration mechanism in solar flares, tremendously enhancing (up to a factor of 10,000) rare elements like 3He and ultra-heavy nuclei, has been puzzling for almost 50 years. Here we present some of the most intense 3He- and Fe-rich solar energetic particle events ever reported. The events were accompanied by nonrelativistic electron events and type-III radio bursts. The corresponding high-resolution, extreme-ultraviolet imaging observations have revealed for the first time a helical structure in the source flare with a jet-like shape. The helical jets originated in relatively small, compact active regions, located at the coronal-hole boundary. A mini-filament at the base of the jet appears to trigger these events. The events were observed with the two Solar Terrestrial Relations Observatories on the backside of the Sun, during the period of increased solar activity in 2014. The helical jets may be a distinct feature of these intense events that is related to the production of high 3He and Fe enrichments.

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Language(s): eng - English
 Dates: 2018-12-262018
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.3847/1538-4357/aa9d8f
 Degree: -

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Title: The Astrophysical Journal
Source Genre: Journal
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Publ. Info: Bristol; Vienna : IOP Publishing; IAEA
Pages: - Volume / Issue: 852 Sequence Number: 76 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215_3