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
Is pre-eruptive null point reconnection required for triggering eruptions?
TL;DR: In this article, the authors studied the magnetic field evolution and topology of the active region NOAA 10486 before the 3B/X1.2 flare of October 26, 2003, using observational data from the French-Italian THEMIS telescope, the Michelson Doppler Imager (MDI) onboard Solar and Heliospheric Observatory (SOHO), the Solar Magnetic Field Telescope (SMFT) at Huairou Solar Observation Station (HSOS), and the Transition Region and Coronal Explorer (TRACE).
Journal ArticleDOI
Toward a Quantitative Model for Simulation and Forecast of Solar Energetic Particle Production during Gradual Events. I. Magnetohydrodynamic Background Coupled to the SEP Model
D. Borovikov,D. Borovikov,Igor V. Sokolov,Ilia I. Roussev,Aleksandre Taktakishvili,Aleksandre Taktakishvili,Tamas I. Gombosi +6 more
Journal ArticleDOI
Continuous Null-point Magnetic Reconnection Builds Up a Torus Unstable Magnetic Flux Rope Triggering the X9.3 Flare in Solar AR 12673
Journal ArticleDOI
Dynamic Topology and Flux Rope Evolution During Non-linear Tearing of 3D Null Point Current Sheets
Peter F. Wyper,David Pontin +1 more
TL;DR: In this article, the dynamic magnetic field within a tearing-unstable three-dimensional (3D) current sheet about a magnetic null point is described in detail, focusing on the evolution of the magnetic null points and flux ropes that are formed during the tearing process.
Journal ArticleDOI
Solar signatures and eruption mechanism of the August 14, 2010 coronal mass ejection (CME)
E. D'Huys,E. D'Huys,Daniel B. Seaton,Daniel B. Seaton,Daniel B. Seaton,Anik De Groof,David Berghmans,Stefaan Poedts +7 more
TL;DR: In this article, the authors investigate the various eruption signatures that were observed for this event and focus on the kinematic evolution of the filament in order to determine its eruption mechanism.
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.
Journal ArticleDOI
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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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