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
Detailed analysis of dynamic evolution of three Active Regions at the photospheric level before flare and CME occurrence
TL;DR: In this paper, a combined analysis of the applications of the weighted horizontal magnetic gradient (denoted as WG M in Korsos et al. (2015)) method and the magnetic helicity tool (Berger and Field, 1984) employed for three active regions (ARs), namely NOAA AR 11261, AR 11283 and AR 11429, was presented.
Journal ArticleDOI
Formation of Coronal Mass Ejections in the Solar Corona and Propagation of the Resulting Plasma Streams in the Heliosphere
TL;DR: A review of studies of coronal mass ejections (CMEs) and the propagation of the resulting interplanetary CMEs in the heliosphere is presented in this paper, where the main parameters of ICMEs, their differences from other types of solar wind (SW) streams, and correlation of the ICME occurrence rate with the state of solar activity are considered.
Journal Article
An Updated View of Solar Eruptive Flares and the Development of Shocks and CMEs : History of the 2006 December 13 GLE-Productive Extreme Event (Special Issue : Twenty Years of Nobeyama Radioheliograph)
Book ChapterDOI
Magnetic 3-D Configurations of Energy Release in Solar Flares
TL;DR: In this paper, a 3D solar flare model is proposed to interpret the solar flare phenomenon, which is based on 2D magnetic field representations and is shown to be a more general model than the standard two-branched flare model.
Journal ArticleDOI
Flare forecasting based on sunspot-groups characteristics
L. Contarino,Francesca Zuccarello,Paolo Romano,Daniele Spadaro,Salvatore L. Guglielmino,V. Battiato +5 more
TL;DR: In this article, the authors focused on the characteristics that must be fulfilled by sunspot-groups in order to be flare-productive and used a statistical approach to forecast solar 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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