Journal ArticleDOI
A Model for Solar Coronal Mass Ejections
TLDR
In this article, a magnetic breakout model for the initiation of a solar coronal mass ejection (CME) was proposed, where reconnection between a sheared arcade and neighboring flux systems triggers the eruption.Abstract:
We propose a new model for the initiation of a solar coronal mass ejection (CME). The model agrees with two properties of CMEs and eruptive flares that have proved to be very difficult to explain with previous models: (1) very low-lying magnetic field lines, down to the photospheric neutral line, can open toward infinity during an eruption; and (2) the eruption is driven solely by magnetic free energy stored in a closed, sheared arcade. Consequently, the magnetic energy of the closed state is well above that of the posteruption open state. The key new feature of our model is that CMEs occur in multipolar topologies in which reconnection between a sheared arcade and neighboring flux systems triggers the eruption. In this "magnetic breakout" model, reconnection removes the unsheared field above the low-lying, sheared core flux near the neutral line, thereby allowing this core flux to burst open. We present numerical simulations that demonstrate our model can account for the energy requirements for CMEs. We discuss the implication of the model for CME/flare prediction.read more
Citations
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Journal ArticleDOI
Chain Reconnections observed in Sympathetic Eruptions
TL;DR: In this paper, the authors present multi-wavelength observations of sympathetic eruptions, associated flares and coronal mass ejections (CMEs) occurring on 2013 November 17 in two close-by active regions.
Journal ArticleDOI
Multiwavelength Observations of an Eruptive Flare: Evidence for Blast Waves and Break-Out
TL;DR: In this article, the authors consider a scenario in which the fast waves and the type-II radio emission were a consequence of a flare blast wave, and the cavity collapse and the hot loops resulted from the break-out of the flux rope through an overlying coronal arcade.
Journal ArticleDOI
Ejections of Magnetic Structures Above a Spherical Wedge Driven by a Convective Dynamo with Differential Rotation
Jörn Warnecke,Jörn Warnecke,Petri J. Käpylä,Petri J. Käpylä,Maarit J. Mantere,Axel Brandenburg,Axel Brandenburg +6 more
TL;DR: In this paper, a convectively driven dynamo in a spherical shell with a nearly isothermal density-stratified cooling layer was used to study the emergence and ejections of magnetic field structures.
Journal ArticleDOI
A Study of Surges: II. On the Relationship between Chromospheric Surges and Coronal Mass Ejections
TL;DR: In this work, large Hα surges (>72 Mm, or 100 arcsec) are studied and it is found that all of the jetlike surges were associated with jetlike CMEs; the diffuse surges were all associated with wide-angle CMES; and the closed-loop surges were not associated with Cmes.
Journal ArticleDOI
Mini-filament Eruptions Triggering Confined Solar Flares Observed by ONSET and SDO
Shuhong Yang,Jun Zhang +1 more
TL;DR: In this article, the authors studied an M5.7 flare in AR 11476 on 2012 May 10 and a micro-flare in the quiet Sun on 2017 March 23.
References
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Journal ArticleDOI
The solar flare myth
TL;DR: In this paper, the authors outline a different paradigm of cause and effect that removes solar flares from their central position in the chain of events leading from the Sun to near-Earth space.
Journal ArticleDOI
Disruption of Coronal Magnetic Field Arcades
Zoran Mikic,Jon A. Linker +1 more
TL;DR: In this paper, the magnetic field expands outward in a process that opens the field lines and produces a tangential discontinuity, leading to an impulsive release of magnetic energy, fast flows, and the ejection of a plasmoid.
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TL;DR: An overview of observations of coronal mass ejections (CMEs) during the interval March 28, 1979 through December 31, 1981 is presented in this paper, where an introduction is provided to the instrument used in the observations, the method of identifying CMEs, the concepts of CME structural classes, CME importance categories, and the distribution of mass ejection among these classes and categories.
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On some properties of force-free magnetic fields in infinite regions of space
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