Speaker
Description
First Name: Henrik
Last Name: Eklund
Affiliation: European Space Agency
All Authors: Eklund, H., Nelson, C.
Abstract: Small-scale dynamic brightenings in the lower corona are observed frequently with the high-resolution Solar Orbiter EUI instrument, yet their formation mechanisms remain uncertain. Many events resemble signatures of small-scale magnetic reconnection, but their varied signatures, magnetic field measurements and morphologies indicate varying formation and that additional processes may contribute. To investigate their origins, we make a multispectral combined analysis of Solar Orbiter EUI data with simultaneous ALMA observations, both offering the highest resolution currently available in their respective wavelength regimes. The ALMA measurements track chromospheric temperature changes, providing direct insight into the underlying dynamics preceding and following each event. These constraints refine our understanding of the associated magnetic field topology and help clarify the relative importance of magnetic reconnection versus alternative formation processes. These results demonstrate the powerful diagnostics the coordinated ALMA–Solar Orbiter observations are for probing new constraints on how small-scale energy release links the chromosphere and low corona.1