8 papers
Enigmatic Line Broadening During Solar Flares: Magnetic Field Broadening?
Thomas Gomez, Adam Kowalski, Cole Tamburri +2
The origin of the extreme broadening observed in chromospheric metal lines during solar and stellar flares, particularly Mg II h&k and Ca II H&K, remains poorly understood. These l…
Evolution of Spatial Complexity in Flare Ribbon Substructure and Its Relationship to Magnetic Reconnection Dynamics
Marcel F. Corchado Albelo, Maria D. Kazachenko, Ryan J. French +5
Recent three-dimensional flare models suggest that flare-ribbon substructure is linked to the fragmentation of the reconnecting current sheet in the corona. Flare-ribbon substructu…
Spectroscopic analysis and RHD modeling of the first Ca II H and H-epsilon flare spectra from DKIST/ViSP
Cole Tamburri, Adam Kowalski, Gianna Cauzzi +7
We analyze decay phase observations of the GOES class C6.7 flare SOL2022-08-19T20:31 by the Visible Spectropolarimeter (ViSP) on the National Science Foundation's Daniel K. Inouye…
Evolution of Flare Ribbon Bead-like Structures in a Solar Flare
Ryan J. French, Maria D. Kazachenko, David Berghmans +6
We present fast cadence and high resolution observations of flare ribbons from the Solar Orbiter Extreme Ultraviolet Imager (EUI). Utilizing the short-exposure observations from th…
Dual Origins of Rapid Flare Ribbon Downflows in an X9-class Solar Flare
Ryan J. French, William H. Ashfield, Cole A. Tamburri +4
We detect rapid downflows of 150-217 km/s in IRIS Si IV 1402.77 nm measurements of an X9-class solar flare on 2024 October 3rd. The fast redshift values persist for over 15 minutes…
Discovery of multi-temperature coronal mass ejection signatures from a young solar analogue
Kosuke Namekata, Kevin France, Jongchul Chae +14
Coronal mass ejections (CMEs) on the early Sun may have profoundly influenced the planetary atmospheres of early Solar System planets. Flaring young solar analogues serve as excell…