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
More filters
Journal ArticleDOI
Block-induced Complex Structures Building the Flare-productive Solar Active Region 12673
TL;DR: In this paper, a block-induced complex structure was proposed for the X9.3 flare, which was triggered by an erupting filament due to the kink instability of the solar disk.
Journal ArticleDOI
Multiwavelength observations of a partially eruptive filament on 2011 september 8
Q. M. Zhang,Zongjun Ning,Yang Guo,Tuanhui Zhou,Xin Cheng,Haisheng Ji,Li Feng,Thomas Wiegelmann +7 more
TL;DR: In this paper, a magnetic null point and the corresponding spine and separatrix surface are found in the active region (AR) 11283 on 8 September 2011, where the sigmoidal filament erupted and split into two parts.
Journal ArticleDOI
Magnetic reconnection rate and flux-rope acceleration of two-ribbon flares
TL;DR: In this article, the authors measured the photospheric magnetic fields and the flare ribbon separation speeds and derived two physical terms for the magnetic reconnection rates: the rate of magnetic flux change rec involved in low corona and the electric field Erec inside the reconnecting current sheet (RCS) that is generated during magnetic reconnections.
Journal ArticleDOI
Initiation of coronal mass ejection and associated flare caused by helical kink instability observed by sdo/aia
Pankaj Kumar,Kyung-Suk Cho,Kyung-Suk Cho,Kyung-Suk Cho,Su-Chan Bong,Sung-Hong Park,Yeon-Han Kim +6 more
TL;DR: In this article, the authors present multiwavelength observations of helical kink instability as a trigger of a coronal mass ejection (CME) which occurred in active region NOAA 11163 on 2011 February 24.
Journal Article
Progress in Understanding Magnetic Reconnection in Laboratory and Space Astrophysical Plasmas
TL;DR: Yamada et al. as mentioned in this paper reviewed the progress in understanding the fundamental physics of magnetic reconnection, focusing on significant results in the past decade from dedicated laboratory experiments, numerical simulations, and space astrophysical observations.
References
More filters
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.
Related Papers (5)
The Atmospheric Imaging Assembly (AIA) on the Solar Dynamics Observatory (SDO)
James R. Lemen,Alan M. Title,David J. Akin,Paul Boerner,C. Chou,Jerry F. Drake,Dexter W. Duncan,Christopher G. Edwards,Frank M. Friedlaender,Gary F. Heyman,Neal E. Hurlburt,N. Katz,Gary D. Kushner,M. Levay,Russell W. Lindgren,D. Mathur,Edward L. McFeaters,Sarah D. Mitchell,Roger A. Rehse,Carolus J. Schrijver,L. Springer,L. Springer,Robert A. Stern,Theodore D. Tarbell,Jean-Pierre Wuelser,C. Jacob Wolfson,C. Yanari,Jay A. Bookbinder,Peter Cheimets,David Caldwell,Edward E. DeLuca,Richard Gates,Leon Golub,Sang Park,William A. Podgorski,R. I. Bush,Philip H. Scherrer,Mark A. Gummin,Peter L. Smith,Gary Auker,Paul Jerram,Peter J. Pool,Regina Soufli,David L. Windt,Sarah Beardsley,Matthew Clapp,J. Lang,Nicholas R. Waltham +47 more