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
Study of Magnetic Helicity Injection in the Active Regions NOAA 9236 Producing Multiple Flare-associated CME Events
Sung-Hong Park,Kanya Kusano,Kyung-Suk Cho,Jongchul Chae,Su-Chan Bong,Pankaj Kumar,Soyoung Park,Yeon-Han Kim,Young-Deuk Park +8 more
TL;DR: In this paper, the authors investigated the spatial and temporal evolution of photospheric magnetic fields in the active region NOAA 9236 that produced eight flare-associated CMEs during the time period of 2000 November 23-26.
Journal ArticleDOI
Observations and Modelling of the Pre-flare Period of the 29 March 2014 X1 Flare.
TL;DR: In this paper, the authors investigated the pre-flare period of this flare from 14:00 to 19:00 UT using joint observations made by IRIS and the Hinode Extreme Ultraviolet Imaging Spectrometer (EIS).
Journal ArticleDOI
Simulations of three-dimensional reconnection in the solar corona
TL;DR: In this paper, the authors investigate the stability and dynamic evolution of three-dimensional magnetic con-gurations, representing stretched arcade structures above a dipolar ii photospheric magnetic neutral line.
Journal ArticleDOI
Linear and nonlinear MHD mode coupling of the fast magnetoacoustic wave about a 3D magnetic null point
J. O. Thurgood,James McLaughlin +1 more
TL;DR: In this article, a special fieldline and flux-based coordinate system was constructed to permit the introduction of a pure fast magnetoacoustic wave in the vicinity of proper and improper 3D null points.
Journal ArticleDOI
Dynamic Coupling of Convective Flows and Magnetic Field during Flux Emergence
TL;DR: In this paper, the authors simulate the buoyant rise of a magnetic flux rope from the solar convection zone into the corona to better understand the energetic coupling of the solar interior to the solar corona, and find that the large-scale convective motion in the convective zone is critical to form and maintain sunspots, while the horizontal converging flows in the near surface layer prevent the concentrated polarities from separating.
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.
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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.
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