Long-lived energetic particle source regions on the Sun

14th Annual International Astrophysics Conference: Linear and Nonlinear Particle Energization throughout the Heliosphere and Beyond

物理学;天文学

Buík, R.^1,2 ; Innes, D.E.^1,2 ; Chen, N.H.^1 ; Mason, G.M.^3 ; Gómez-Herrero, R.^4 ; Wiedenbeck, M.E.^5

Max-Planck-Institut für Sonnensystemforschung, Göttingen

D-37077, Germany^1

Max Planck/Princeton Center for Plasma Physics, Princeton

NJ

08540, United States^2

Applied Physics Laboratory, Johns Hopkins University, Laurel

MD

20723, United States^3

Space Research Group, University of Alcalá, Alcalá de Henares

E-28871, Spain^4

Jet Propulsion Laboratory, California Institute of Technology, Pasadena

CA

91109, United States^5

关键词: Active regions;    Energetic particles;    Impulsive Events;    Solar active regions;    Solar energetic particles;    Source region;    STEREO spacecraft;    Ultra heavy nuclei;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/642/1/012002/pdf
DOI  :  10.1088/1742-6596/642/1/012002

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

Discovered more than 40 years ago, impulsive solar energetic particle (SEP) events are still poorly understood. The enormous abundance enhancement of the rare3He isotope is the most striking feature of these events, though large enhancements in heavy and ultra-heavy nuclei are also observed. Recurrent3He-rich SEPs in impulsive events have only been observed for limited time periods, up to a few days which is typically the time that a single stationary spacecraft is magnetically connected to the source active regions on the Sun. With the launch of the two STEREO spacecraft we now have the possibility of longer connection time to solar active regions. We examined the evolution of source regions showing repeated3He-rich SEP emissions for relatively long time periods. We found that recurrent3He-rich SEPs in these long-lived sources occur after the emergence of magnetic flux.