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Observation of super-Alfvénic slippage of reconnecting magnetic field lines on the Sun
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SYSNO ASEP 0619721 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Observation of super-Alfvénic slippage of reconnecting magnetic field lines on the Sun Author(s) Lörinčík, J. (US)
Dudík, Jaroslav (ASU-R) RID, ORCID
Sainz Dalda, A. (US)
Aulanier, G. (FR)
Polito, V. (US)
de Pontieu, B. (US)Source Title Nature Astronomy. - : Nature Publishing Group - ISSN 2397-3366
Roč. 9, č. 1 (2025), s. 45-54Number of pages 17 s. Publication form Online - E Language eng - English Country US - United States Keywords magnetic reconnection ; slip-running reconnection ; slipping motion ; solar flares ; IRIS observations OECD category Astronomy (including astrophysics,space science) R&D Projects GA20-07908S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support ASU-R - RVO:67985815 UT WOS 001337901800001 EID SCOPUS 85207005857 DOI https://doi.org/10.1038/s41550-024-02396-4 Annotation Slipping motions of magnetic field lines are a distinct signature of three-dimensional magnetic reconnection, a fundamental process driving solar and stellar flares. While being a key prediction of numerical experiments, the rapid super-Alfvénic field line slippage driven by the ‘slip-running’ reconnection has remained elusive in previous observations. New frontiers into exploring transient flare phenomena were introduced by recently designed high cadence observing programs of the Interface Region Imaging Spectrograph (IRIS). By exploiting high temporal resolution imagery (~2 s) of IRIS, here we reveal slipping motions of flare kernels at speeds reaching thousands of kilometres per second. The fast kernel motions are direct evidence of slip-running reconnection in quasi-separatrix layers, regions where magnetic field strongly changes its connectivity. Our results provide observational proof of theoretical predictions unaddressed for nearly two decades and extend the range of magnetic field configurations where reconnection-related phenomena can occur. Workplace Astronomical Institute Contact Anežka Melichárková, bibl@asu.cas.cz, Tel.: 323 620 326 Year of Publishing 2026 Electronic address https://hdl.handle.net/11104/0366361
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