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
The Role of Magnetic Reconnection in the Observable Features of Solar Eruptions
TL;DR: In this paper, the authors investigated the evolution of morphological features of the magnetic configuration in a CME according to a catastrophe model of flux rope CMEs developed previously, and tentatively identified the outer shell, the expanded bubble, and the flux rope with the leading edge, void, and core of the three-component CME structure, respectively.
Journal ArticleDOI
Observing the release of twist by magnetic reconnection in a solar filament eruption
Zhike Xue,Xiaoli Yan,Xin Cheng,Liheng Yang,Yingna Su,Bernhard Kliem,Bernhard Kliem,Jun Zhang,Zhong Liu,Yi Bi,Yongyuan Xiang,Kai Yang,Li Zhao +12 more
TL;DR: Evidence of fast reconnection in a solar filament eruption is presented using high-resolution H-alpha images from the New Vacuum Solar Telescope, supplemented by extreme ultraviolet observations, to demonstrate a new role for reconnections in solar eruptions: the release of magnetic twist.
Journal ArticleDOI
Magnetar giant flares and afterglows as relativistic magnetized explosions
Maxim Lyutikov,Maxim Lyutikov +1 more
TL;DR: In this paper, the authors proposed that giant flares on soft γ-ray repeaters produce relativistic, strongly magnetized, weakly baryon-loaded magnetic clouds, similar to solar coronal mass ejection (CME) events.
Journal ArticleDOI
Slow-rise and fast-rise phases of an erupting solar filament, and flare emission onset
TL;DR: In this article, the authors observed the eruption of an active region solar filament of 1998 July 11 using high time cadence and high spatial resolution EUV observations from the TRACE satellite, along with soft X-ray images from the SXT telescope (SXT) on the Yohkoh satellite.
Journal ArticleDOI
Observations and magnetic field modeling of the flare/coronal mass ejection event on 2010 april 8
Yingna Su,Vincent Surges,Vincent Surges,Adriaan van Ballegooijen,Edward E. DeLuca,Leon Golub +5 more
TL;DR: In this paper, a grid of magnetic field models using two magneto-frictional relaxation methods was constructed to study the flare/coronal mass ejection event that occurred in Active Region 11060 on 2010 April 8.
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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