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
Buoyant disruption of magnetic arcades with self‐induced shearing
TL;DR: In this paper, the authors present the results of magnetohydrodynamic simulations of the nonlinear development of instabilities of magnetically sheared arcades and show how they relate to plasmoid ejections and coronal mass ejections (CMEs).
Journal ArticleDOI
A quasi-periodic fast-propagating magnetosonic wave associated with the eruption of a magnetic flux rope
TL;DR: In this paper, a detailed observational analysis of a high-quality quasi-periodic fast-propagating (QFP) magnetosonic wave that was associated with the eruption of a magnetic flux rope and a GOES C5.0 flare is presented.
Journal ArticleDOI
A Study of Pre-flare Solar Coronal Magnetic Fields: Magnetic Flux Ropes
TL;DR: In this article, the authors performed a study of all the magnetic flux ropes (MFRs) configurations that lead to major solar flares, either eruptive or confined, from 2011 to 2017 near the solar disk center.
Journal ArticleDOI
Unwinding motion of a twisted active region filament
TL;DR: In this article, an active region filament eruption in active region NOAA 11082 was studied in detail on 2010 June 22. And it was found that the filament was a twisted flux rope and its unwinding motion was like a solar tornado.
Journal ArticleDOI
Formation and reconnection of three-dimensional current sheets in the solar corona
TL;DR: In this paper, a 3D MHD simulation with adaptive mesh refinement is used to resolve the current sheet and magnetic reconnection dynamics in detail, showing no evidence for a disruption or a secondary instability even for aspect ratios as high as 80:1.
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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