Nonequilibrium Processes in the Solar Corona, Transition Region, Flares, and Solar Wind (Invited Review)

J Dudík, E Dzifčáková, N Meyer-Vernet, G Del Zanna… - Solar Physics, 2017 - Springer
We review the presence and signatures of the non-equilibrium processes, both non-
Maxwellian distributions and non-equilibrium ionization, in the solar transition region …

Spectroscopic observations of current sheet formation and evolution

HP Warren, DH Brooks, I Ugarte-Urra… - The Astrophysical …, 2018 - iopscience.iop.org
We report on the structure and evolution of a current sheet that formed in the wake of an
eruptive X8. 3 flare observed at the west limb of the Sun on 2017 September 10. Using …

Solar energetic particle charge states and abundances with nonthermal electrons

JY Lee, S Kahler, JC Raymond… - The Astrophysical …, 2024 - iopscience.iop.org
An important aspect of solar energetic particle (SEP) events is their source populations.
Elemental abundance enhancements of impulsive SEP events, originating in presumed …

Characteristics and applications of interplanetary coronal mass ejection composition

HQ Song, S Yao - Science China Technological Sciences, 2020 - Springer
In situ measurements of interplanetary coronal mass ejection (ICME) composition, including
elemental abundances and charge states of heavy ions, open a new avenue to study …

Investigations of a supra-arcade fan and termination shock above the top of the flare-loop system of the 2017 September 10 event

Q Cai, C Shen, JC Raymond, Z Mei… - Monthly Notices of …, 2019 - academic.oup.com
On 2017 September 10, a major eruption on the west solar limb produced a class X-8.2 flare
and a superfast coronal mass ejection (CME). During the eruptive process, the geometric …

Elemental abundances of prominence material inside ICMEs

ST Lepri, YJ Rivera - The Astrophysical Journal, 2021 - iopscience.iop.org
A small number of interplanetary coronal mass ejections (ICMEs) have been identified that
contain measurable contributions from prominence plasma. In situ measurements from …

Thermal structure of current sheets and supra-arcade downflows in the solar corona

WJ Hanneman, KK Reeves - The Astrophysical Journal, 2014 - iopscience.iop.org
After the peak intensity of many large solar flares, magnetic and thermodynamic processes
give rise to a phenomenon known as supra-arcade downflows (SADs). SADs are sunward …

[HTML][HTML] Plasma heating induced by tadpole-like downflows in the flaring solar corona

T Samanta, H Tian, B Chen, KK Reeves, MCM Cheung… - The Innovation, 2021 - cell.com
As one of the most spectacular energy release events in the solar system, solar flares are
generally powered by magnetic reconnection in the solar corona. As a result of the re …

Density diagnostics derived from the O iv and S iv intercombination lines observed by IRIS

V Polito, G Del Zanna, J Dudík, HE Mason… - Astronomy & …, 2016 - aanda.org
The intensity of the O iv 2s 2 2p 2 P–2s2p 2 4 P and S iv 3 s 2 3p 2 P–3s 3p 2 4 P
intercombination lines around 1400 Å observed with the Interface Region Imaging …

Nonthermal Observations of a Flare Loop-top Using IRIS Fe XXI: Implications for Turbulence and Electron Acceleration

W Ashfield IV, V Polito, S Yu, H Collier… - The Astrophysical …, 2024 - iopscience.iop.org
The excess broadening of high-temperature spectral lines, long observed near the tops of
flare arcades, is widely considered to result from magnetohydrodynamic turbulence …