Origin of 3He abundance enhancements in gradual solar energetic particle events

Autor:	Bucik, Radoslav, Hart, Samuel T., Dayeh, Maher A., Desai, Mihir I., Mason, Glenn M., Wiedenbeck, Mark E.
Rok vydání:	2024
Předmět:	Astrophysics - Solar and Stellar Astrophysics Physics - Space Physics
Druh dokumentu:	Working Paper
Popis:	We examined the origin of 3He abundance enhancement in 23 high-energy (25-50 MeV) solar proton events that coincide with 3He-rich periods detected by ACE ULEIS in 1997-2021. In seven events, 3He enhancement was due to 3He leftover from preceding events or independent 3He events occurring during proton events. One event is the most likely impulsive (3He-rich), and another is unclear. Reaccelerated remnant flare material was the most probable cause of 3He enhancements in the remaining 14 proton events. Imaging observations showed coronal jets in the parent active regions in six of these 14 events. Remarkably, the highest 3He/4He occurred in events with jets, implying their contribution to 3He enhancement. Comment: 6 pages, 4 figures, 2 tables, accepted for publication in IAU Symposium 388 Proceedings
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2410.15515 Zobrazit plný text záznamu View this record from Arxiv