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- W2898907334 startingPage "78" @default.
- W2898907334 abstract "In this paper, we study the onset process of a solar eruption on 21 February 2015, focusing on its unambiguous precursor phase. With multi-wavelength imaging observations from the Atmospheric Imaging Assembly (AIA), definitive tether-cutting (TC) reconnection signatures, i.e., flux convergence and cancellation, bidirectional jets, as well as topology change of hot loops, were clearly observed below the pre-eruption filament. As TC reconnection progressed between the sheared arcades that enveloped the filament, a channel-like magnetic flux rope (MFR) arose in multi-wavelength AIA passbands wrapping around the main axis of the filament. With the subsequent ascent of the newborn MFR, the filament surprisingly split into three branches. After a 7-hour slow rise phase, the high-lying branch containing by the MFR abruptly accelerated causing a two-ribbon flare; while the two low-lying branches remained stable forming a partial eruption. Complemented by kinematic analysis and decay index calculation, we conclude that TC reconnection played a key role in building up the eruptive MFR and triggering its slow rise. The onset of the torus instability may have led the high-lying branch into the standard eruption scenario in the fashion of a catastrophe." @default.
- W2898907334 created "2018-11-09" @default.
- W2898907334 creator A5017261261 @default.
- W2898907334 creator A5032767612 @default.
- W2898907334 creator A5036971559 @default.
- W2898907334 creator A5041560670 @default.
- W2898907334 creator A5049318586 @default.
- W2898907334 date "2018-12-13" @default.
- W2898907334 modified "2023-10-16" @default.
- W2898907334 title "Witnessing Tether-cutting Reconnection at the Onset of a Partial Eruption" @default.
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