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
Magnetic field confinement in the solar corona. i. force-free magnetic fields
TL;DR: In this article, axisymmetric force-free magnetic fields external to a unit sphere are studied as solutions to boundary value problems in an unbounded domain posed by the equilibrium equations.
Journal ArticleDOI
Successive solar flares and coronal mass ejections on 2005 september 13 from noaa ar 10808
TL;DR: In this article, a multiwavelength study of the 2005 September 13 eruption from NOAA AR 10808 that produced total four flares and two fast coronal mass ejections (CMEs) within 1.5 hours was presented.
Journal ArticleDOI
Coronal Magnetic Structure of Earthbound CMEs and In Situ Comparison
Erika Palmerio,Emilia Kilpua,Christian Möstl,Volker Bothmer,Alexander W. James,Lucie M. Green,Alexey Isavnin,Jackie A. Davies,Richard A. Harrison +8 more
TL;DR: In this article, the authors compared the intrinsic flux rope type, that is, the CME orientation and handedness during eruption, with the in situ flux rope types for 20 CME events that have been uniquely linked from Sun to Earth through heliospheric imaging.
Journal ArticleDOI
Successive Solar Flares and Coronal Mass Ejections on 2005 September 13 from Noaa Ar 10808
TL;DR: In this paper, a multiwavelength study of the 2005 September 13 eruption from NOAA 10808 that produced total four flares and two fast coronal mass ejections (CMEs) within 1.5 hours is presented.
Journal ArticleDOI
1997 May 12 Coronal Mass Ejection Event. I. A Simplified Model of the Preeruptive Magnetic Structure
TL;DR: In this article, a simple model of the coronal magnetic field prior to the CME eruption on 1997 May 12 is developed by superimposing a large-scale background field and a localized bipolar field to model the active region (AR) in the current-free approximation.
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