000006324 001__ 6324
000006324 005__ 20230201162208.0
000006324 037__ $$aCTALK-2023-0058
000006324 100__ $$aKahil, F.
000006324 245__ $$aThe magnetic drivers of EUI campfires seen by SO/ PHI
000006324 260__ $$c2022
000006324 269__ $$c2022-09-13
000006324 520__ $$aCampfires are the smallest ever detected localised brightenings in the quiet-Sun, observed by the High Resolution Imager (EUI/HRI) of the Extreme Ultraviolet Imager (EUI) at 17.4 nm on-board the Solar Orbiter (SO) spacecraft. The photospheric magnetic field configuration and its evolution, underlying campfires, are key to understanding the drivers of these heating events. The Polarimetric and Helioseismic Imager (SO/PHI) on- board SO offers a unique opportunity to provide co-observations at a spatial resolution similar to EUI (1 arcsecond). To this end, we employed magnetograms recorded by the High Resolution Telescope of PHI (PHI/HRT, 617.3 nm) to study the magnetic field below the EUI campfires observed during the cruise-phase of SO in February 2021. During this period, both instruments achieved a spatial resolution of 380 km on the Sun. We observed signatures of magnetic flux cancellation in the vicinity of most of the heating events, indicating that magnetic reconnection in the lower atmosphere could be their main driver. However, the PHI/HRT timeseries were not ideal in terms of cadence and overlap with the EUI/HRI observations to confirm this scenario. This unique study is revisited, now with the data acquired by both instruments during the first and second Remote Sensing Windows (RSWs) of SO's nominal phase in two observational campaigns on March 8th and 17th, 2022. At orbital distances of 0.489 AU and 0.379 AU from the Sun, both instruments achieved a spatial resolution of 360 km and 280 km, respectively. These novel data offer new insights into the photospheric counterpart of EUI campfires and consequently, improve our understanding of the underlying magnetic processes driving these events.
000006324 594__ $$aSTCE
000006324 6531_ $$aSolar Orbiter
000006324 6531_ $$aEUI
000006324 700__ $$aChitta, L. P. 
000006324 700__ $$aPeter, H.  
000006324 700__ $$aAuchère, F. 
000006324 700__ $$aSolanki, S. K. 
000006324 700__ $$aManyOtherAuthors, X.
000006324 700__ $$aBerghmans, D
000006324 700__ $$aPHIteam, X.
000006324 700__ $$aEUI team, X.
000006324 773__ $$tSolar Orbiter 8, Belfast (UK)
000006324 8560_ $$fdavid.berghmans@observatoire.be
000006324 85642 $$ahttps://blogs.qub.ac.uk/so8belfast/programme/
000006324 906__ $$aInvited
000006324 980__ $$aCTALKINVI