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
The Dynamic Formation of Prominence Condensations
TL;DR: In this paper, a model for the formation of a prominence condensation in a coronal loop is presented, where the spatial localization of loop heating near the chromosphere leads to a catastrophic cooling in the corona.
Journal ArticleDOI
Tracking Vector Magnetograms with the Magnetic Induction Equation
TL;DR: The DAVE4VM as discussed by the authors was developed in 2006 for estimating velocities from line-of-sight magnetograms and is modified to directly incorporate horizontal magnetic fields to produce a differential affine velocity estimator for vector magnetograms.
Journal ArticleDOI
Dynamical and Physical Properties of a Post-Coronal Mass Ejection Current Sheet
TL;DR: In this paper, the authors investigated the morphological and dynamical properties of the Kopp-Pneuman-type coronal mass ejection (CME) and found that the magnetic field strength in the vicinity of the current sheet is of the order of 1 G.
Journal ArticleDOI
Magnetic field structures triggering solar flares and coronal mass ejections
Kanya Kusano,Kanya Kusano,Yumi Bamba,Tetsuya T. Yamamoto,Yusuke Iida,Shin Toriumi,Ayumi Asai +6 more
TL;DR: In this paper, the authors studied the nonlinear dynamics caused by a wide variety of magnetic structures in terms of three-dimensional magnetohydrodynamic simulations and determined that two different types of small magnetic structures favor the onset of solar eruptions.
Journal ArticleDOI
Structure, Stability, and Evolution of Magnetic Flux Ropes from the Perspective of Magnetic Twist
Rui Liu,Bernhard Kliem,Bernhard Kliem,Viacheslav S. Titov,Jun Chen,Yuming Wang,Haimin Wang,Chang Liu,Yan Xu,Thomas Wiegelmann +9 more
TL;DR: In this paper, the authors investigated the evolution of the NOAA active region 11817 during 2013 August 10-12, when it developed a complex field configuration and produced four confined, followed by two eruptive, flares.
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.
Journal ArticleDOI
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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