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
The Eruption of Outer Spine-like Loops Leading to a Double-stage Circular-ribbon Flare
Journal ArticleDOI
Helical Eruptive Prominence Associated with a Pair of Overlapping CMEs on 21 April 2001
TL;DR: In this article, the authors investigated the eruption of limb prominence on 21 April 2001 associated with two coronal mass ejections (CMEs) and found that the eruption was quite impulsive (with peak acceleration ≈470 m s−2).
Journal ArticleDOI
Generalization of the Magnetic Field Configuration of Typical and Atypical Confined Flares
Navin Chandra Joshi,Navin Chandra Joshi,Xiaoshuai Zhu,Brigitte Schmieder,Brigitte Schmieder,Guillaume Aulanier,Miho Janvier,Bhuwan Joshi,Tetsuya Magara,Ramesh Chandra,Satoshi Inoue +10 more
Journal ArticleDOI
Two-Dimensional Spectroscopy of Photospheric Shear Flows in a Small δ Spot
TL;DR: In this article, high-resolution observations of NOAA-10756 obtained with the 65 cm vacuum reflector at Big Bear Solar Observatory (BBSO) were combined with two-dimensional spectroscopic data to study the temporal evolution of the three-dimensional vector flow field in the β δ sunspot group.
Journal ArticleDOI
Catastrophe of Coronal Flux Rope in Unsheared and Sheared Bipolar Magnetic Fields
TL;DR: In this paper, the authors investigated the catastrophic behavior of a preexisting coronal magnetic flux rope embedded in a dipolar or partially open bipolar background field, which is either unsheared or sheared with a given footpoint displacement of magnetic field lines.
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