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
A Comparative Study of Confined and Eruptive Flares in NOAA AR 10720
TL;DR: In this paper, the authors investigate the distinct properties of two types of flares: eruptive flares associated with CME and confined flares without CMEs, and they find that the decay index of the transverse magnetic field in the low corona has a larger value for eruptive than that for confined ones.
Journal ArticleDOI
Multispacecraft recovery of a magnetic cloud and its origin from magnetic reconnection on the Sun
Christian Möstl,Christian Möstl,Charlie J. Farrugia,C. Miklenic,Manuela Temmer,Antoinette B. Galvin,Janet G. Luhmann,Emilia Kilpua,Emilia Kilpua,M. Leitner,Teresa Nieves-Chinchilla,Astrid Veronig,Helfried K. Biernat,Helfried K. Biernat +13 more
TL;DR: In this paper, a multispacecraft technique was applied to infer the structure of a large-scale magnetic flux rope in the solar wind, and a combined magnetic field map was constructed by integrating the Grad-Shafranov equation in the interplanetary context.
Journal ArticleDOI
CHROMOSPHERE TO 1 au SIMULATION OF THE 2011 MARCH 7th EVENT: A COMPREHENSIVE STUDY OF CORONAL MASS EJECTION PROPAGATION
Meng Jin,Ward B. Manchester,B. van der Holst,Igor V. Sokolov,Gabor Toth,Angelos Vourlidas,C. A. de Koning,Tamas I. Gombosi +7 more
TL;DR: In this paper, a global magnetohydrodyanmic (MHD) simulation of the fast coronal mass ejection (CME) that occurred on 2011 March 7 was performed using the newly developed Alfv\'en Wave Solar Model (AWSoM), which describes the background solar wind starting from the upper chromosphere and extends to 24 R$(n)
Journal ArticleDOI
Flare energy build-up in a decaying active region near a coronal hole
Yingna Su,Yingna Su,Adriaan van Ballegooijen,Brigitte Schmieder,A. Berlicki,Yang Guo,Leon Golub,Guangli Huang +7 more
TL;DR: In this paper, a B1.7 two-ribbon flare occurred in a highly nonpotential decaying active region near a coronal hole at 10: 00 UT on 2008 May 17.
Journal ArticleDOI
The topological behaviour of 3D null points in the Sun's corona
Daniel Stephen Brown,Eric Priest +1 more
TL;DR: Brown D. S. and Priest E. R. as discussed by the authors studied the topological behavior of 3D null points in the Sun's corona, and found that the 3D points are the most similar to the ones in the Earth's magnetic field.
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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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
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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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