Journal ArticleDOI
The Torus instability
Bernhard Kliem,Tibor Torok +1 more
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In this paper, the expansion instability of a toroidal current ring in low-beta magnetized plasma is investigated, and the results are verified with experiments on spheromak expansion and with essential properties of solar coronal mass ejections.Abstract:
The expansion instability of a toroidal current ring in low-beta magnetized plasma is investigated. Qualitative agreement is obtained with experiments on spheromak expansion and with essential properties of solar coronal mass ejections, unifying the two apparently disparate classes of fast and slow coronal mass ejections.read more
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Journal ArticleDOI
Electric Current Evolution at the Footpoints of Solar Eruptions
Krzysztof Barczynski,Krzysztof Barczynski,Guillaume Aulanier,Miho Janvier,Brigitte Schmieder,Sophie Masson +5 more
TL;DR: In this paper, the authors analyzed the only 9 eruptive X-class flares for which clear ribbon-hooks were identifiable, and showed a decrease of the electric current in the area surrounded by the ribbon hooks during and after the eruption.
Journal ArticleDOI
A new trigger mechanism for coronal mass ejections: The role of confined flares and photospheric motions in the formation of hot flux ropes
Alexander W. James,Alexander W. James,Lucie M. Green,L. van Driel-Gesztelyi,L. van Driel-Gesztelyi,L. van Driel-Gesztelyi,Gherardo Valori +6 more
TL;DR: In this article, extreme-ultraviolet observations were used to identify five pre-eruptive hot flux ropes in the solar corona and study how they evolved, and they were used as indicators of episodic bursts of magnetic reconnection by which each flux rope formed.
Journal ArticleDOI
Magnetic energy release: flares and coronal mass ejections
TL;DR: In this article, the authors describe key observational signatures of flares and CMEs on the Sun, their magnetic field topology, and discuss how the combined analysis of solar and interplanetary observations can be used to constrain the flare/CME ejection mechanism.
Journal ArticleDOI
Eruptions from coronal bright points: A spectroscopic view by IRIS of a mini-filament eruption, QSL reconnection, and reconnection-driven outflows
TL;DR: In this paper , the authors investigated a mini-lament eruption associated with cancelling magnetic fluxes in the coronal bright point (CBP) and showed that the mini-eruption is manifested via the ejection of hot (cBP loops) and cool (mini-filament) plasma recorded in both imaging and spectroscopic data.
Journal ArticleDOI
Height of a solar filament before eruption
TL;DR: The relationship between the height of a solar filament observed above the photosphere before the eruption on October 21, 2010, and the critical height of the stable equilibrium of magnetic flux ropes in the coronal magnetic field is analyzed in this paper.
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