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
Toward Understanding the 3D Structure and Evolution of Magnetic Flux Ropes in an Extremely Long Duration Eruptive Flare
TL;DR: In this paper, the authors analyze the initial eruptive process of an extremely long duration C7.7-class solar flare that occurred on 2011 June 21, and track the evolution of the eruption in 3D in a rare slow-motion manner.
Journal ArticleDOI
Two-current-sheet reconnection model of interdependent flare and coronal mass ejection
Y. Zhang,J. X. Wang,Youqiu Hu +2 more
TL;DR: In this article, time-dependent resistive magnetohydrodynamic simulations are carried out to study a flux rope eruption caused by magnetic reconnection with implication in coexistent flare-CME (coronal mass ejection) events.
STEREO quadrature observations of coronal dimming at the onset of mini-CMEs
Davina Innes,Scott W. McIntosh +1 more
TL;DR: In this paper, the authors investigated coronal dimmings at the onset of small-scale chromospheric eruptions using unique quadrature observations with the two STEREO spacecraft.
Journal ArticleDOI
The Three-part Structure of a Filament-unrelated Solar Coronal Mass Ejection
Haiyun Song,Haiyun Song,Xin Cheng,Yao Chen,Jie Zhang,Bing Wang,Leping Li,Bo Li,Qiang Hu,Gang Li +9 more
TL;DR: Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, and Institute of Space Sciences, Shandong University, Weihai as mentioned in this paper, 264209, China key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012.
Journal ArticleDOI
Flux Accretion and Coronal Mass Ejection Dynamics
Brian T. Welsch,Brian T. Welsch +1 more
TL;DR: In this article, the authors investigate the effect of magnetic reconnection on the acceleration of CMEs and show that magnetic reconnections play a major role in fast CME acceleration.
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.
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Disruption of Coronal Magnetic Field Arcades
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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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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
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