000007164 001__ 7164
000007164 005__ 20250102103111.0
000007164 0247_ $$2DOI$$a10.1051/0004-6361/202451838  
000007164 037__ $$aSCART-2025-0001
000007164 100__ $$aCollier, Hannah  
000007164 245__ $$aSolar flares in the Solar Orbiter era: Short-exposure EUI/FSI observations of STIX flares
000007164 260__ $$c2024
000007164 520__ $$aAims. This paper aims to demonstrate the importance of short-exposure extreme ultraviolet (EUV) observations of solar flares in the study of particle acceleration, heating, and energy partition in flares. This work highlights the observations now available from the Extreme Ultraviolet Imager (EUI) instrument suite on board Solar Orbiter while operating in short-exposure mode. Methods. A selection of noteworthy flares observed simultaneously by the Spectrometer Telescope for Imaging X-rays (STIX) and the Full Sun Imager of EUI (EUI/FSI) are detailed. New insights are highlighted and potential avenues of investigation are demonstrated, including forward-modelling of the atmospheric response to a non-thermal beam of electrons using the RADYN 1D hydrodynamic code, in order to compare the predicted and observed EUV emission. Results. The examples given in this work demonstrate that short-exposure EUI/FSI observations are providing important diagnostics during flares. A dataset of more than 9000 flares observed by STIX (from November 2022 until December 2023) with at least one short-exposure EUI/FSI 174 Å image is currently available. The observations reveal that the brightest parts of short-exposure observations consist of substructure in flaring ribbons that spatially overlap with the hard X-ray emission observed by STIX in the majority of cases. We show that these observations provide an opportunity to further constrain the electron energy flux required for flare modelling, among other potential applications.
000007164 594__ $$aSTCE
000007164 6531_ $$aSolar Orbiter
000007164 6531_ $$aEUI
000007164 6531_ $$asolar flares
000007164 700__ $$aHayes, Laura A.  
000007164 700__ $$aPurkhart, Stefan
000007164 700__ $$aKrucker, Säm
000007164 700__ $$aRyan, Daniel F.  
000007164 700__ $$aPolito, Vanessa 
000007164 700__ $$aVeronig, Astrid M.  
000007164 700__ $$aHarra, Louise K.  
000007164 700__ $$aBerghmans, David  
000007164 700__ $$aKraaikamp, Emil 
000007164 700__ $$aDominique, Marie 
000007164 700__ $$aDolla, Laurent R.  
000007164 700__ $$aVerbeeck, Cis   
000007164 773__ $$nid.A176$$pAstronomy & Astrophysics$$v692$$y2024
000007164 8560_ $$fdavid.berghmans@ksb-orb.be
000007164 85642 $$ahttps://arxiv.org/pdf/2411.09319
000007164 85642 $$ahttps://www.aanda.org/articles/aa/pdf/2024/12/aa51838-24.pdf
000007164 905__ $$apublished in
000007164 980__ $$aREFERD