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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Observations of Magnetic Flux-rope Oscillation During the Precursor Phase of a Solar Eruption
Guiping Zhou,Jie Zhang +1 more
TL;DR: In this paper, the authors reported the finding of the precursor activity manifested as the transverse oscillation of a sigmoid, which is likely a pre-existing magnetic flux rope (MFR), that led to the onset of an X class flare and a fast halo coronal mass ejection (CME) on 2014 September 10.
Journal ArticleDOI
Onset of Magnetic Explosion in Solar Coronal Jets in Quiet Regions on the Central Disk
TL;DR: In this paper, the authors examined the initiation of 10 coronal jet eruptions in quiet regions on the central disk, thereby avoiding near-limb spicule-forest obscuration of the slow-rise onset of the minifilament eruption.
Journal ArticleDOI
Coronal Magnetic Field Topology over Filament Channels: Implication for Coronal Mass Ejection Initiations
Yan Li,Janet G. Luhmann +1 more
TL;DR: The magnetic field topology at the coronal mass ejection (CME) source regions has been one of the major focuses of CME initiation models as mentioned in this paper, and it has been shown that a bipolar magnetic topology can be the source region of a CME.
Journal ArticleDOI
A Confined Partial Eruption of Double-decker Filaments
Ruisheng Zheng,Shuhong Yang,Changhui Rao,Yangyi Liu,Libo Zhong,Bing Wang,Hongqiang Song,Zhen Li,Yao Chen +8 more
Journal ArticleDOI
In Situ Heating of the 2007 May 19 CME Ejecta Detected by STEREO/PLASTIC and ACE
TL;DR: In this article, the authors investigate the representation of the CME magnetic field as an expanding spheromak configuration, where the plasma heating is prescribed by the choice of anomalous resistivity and the sphermak dynamics.
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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Coronal mass ejections - 1979-1981
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.
Journal ArticleDOI
On some properties of force-free magnetic fields in infinite regions of space
TL;DR: In this article, a priori inequalities are defined which must be satisfied by the force-free equations, and upper bounds for the magnetic energy of the region provided the value of the magnetic normal component at the boundary of a region can be shown to decay sufficiently fast at infinity.
Journal ArticleDOI
Force-free magnetic fields - The magneto-frictional method
TL;DR: In this article, a magneto-frictional method was proposed to calculate magnetic field configurations in which the Lorentz force j x B is everywhere zero, subject to specified boundary conditions.
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