3 papers
astro-ph.SR2025
Systematic non-thermal velocity increase preceding soft X-ray flare onset: A large-scale Hinode/EIS study
Andy S. H. To, Abigail Burden, Deborah Baker +12
Non-thermal velocities, derived from spectral line broadening, can provide crucial insights into plasma dynamics before and during solar flares. To systematically study the pre-fla…
astro-ph.SR2025
On the million-degree signature of spicules
Souvik Bose, Jayant Joshi, Paola Testa +1
Spicules have often been proposed as substantial contributors toward the mass and energy balance of the solar corona. While their transition region (TR) counterpart has unequivocal…
astro-ph.SR2024
On the Nature of Nonthermal Broadening of Spectral Lines Observed by IRIS
Kyuhyoun Cho, Bart De Pontieu, Paola Testa
The origin of nonthermal broadening in solar spectra is one of the long-standing questions in solar physics. Various processes have been invoked - including unresolved flows, waves…