Impulsive Solar Energetic Particle Events: EUV Waves and Jets

TL;DR

This paper reviews the connection between impulsive solar energetic particle events, coronal jets, and EUV waves, highlighting their elemental composition, spectral shapes, and the recent discovery of EUV waves accompanying jets.

Contribution

It provides a comprehensive overview of the current understanding of how EUV waves relate to jets and energetic ions in impulsive SEP events, emphasizing new observational insights.

Findings

Impulsive SEP events have enhanced 3He and heavy ions.

EUV waves are often observed alongside jets in these events.

Spectral shapes vary from power laws to rounded spectra.

Abstract

Impulsive solar energetic particle (ISEP) events show peculiar elemental composition, with enhanced 3He and heavy-ion abundances, markedly different from our solar system composition. Furthermore, the events are characterized by a wide variety of energy spectral shapes from power laws to rounded spectra toward the low energies. Solar sources of the events have been firmly associated with coronal jets. Surprisingly, new observations have shown that events are often accompanied by so-called extreme-ultraviolet (EUV) coronal waves - a large-scale phenomenon compared to jets. This paper outlines the current understanding of the linkage of EUV waves with jets and energetic ions in ISEP events.