A Model for Energy Buildup and Eruption Onset in Coronal Mass Ejections
@article{Dahlin2019AMF, title={A Model for Energy Buildup and Eruption Onset in Coronal Mass Ejections}, author={Joel T. Dahlin and Spiro K. Antiochos and C. Richard DeVore}, journal={The Astrophysical Journal}, year={2019}, volume={879} }
Coronal mass ejections (CMEs) and eruptive flares (EFs) are the most energetic explosions in the solar system. Their underlying origin is the free energy that builds up slowly in the sheared magnetic field of a filament channel. We report the first end-to-end numerical simulation of a CME/EF, from zero-free-energy initial state through filament channel formation to violent eruption, driven solely by the magnetic-helicity condensation process. Helicity is the topological measure of linkages…
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References
SHOWING 1-10 OF 34 REFERENCES
The Mechanism for the Energy Buildup Driving Solar Eruptive Events
- Physics
- 2017
The underlying origin of solar eruptive events (SEEs), ranging from giant coronal mass ejections to small coronal-hole jets, is that the lowest-lying magnetic flux in the Sun’s corona undergoes…
ROTATION OF CORONAL MASS EJECTIONS DURING ERUPTION
- Physics
- 2009
Understanding the connection between coronal mass ejections (CMEs) and their interplanetary counterparts (ICMEs) is one of the most important problems in solar-terrestrial physics. We calculate the…
A Model for Solar Coronal Mass Ejections
- Physics
- 1999
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…
A universal model for solar eruptions.
- PhysicsNature
- 2017
Simulations of a coronal jet driven by filament ejection are reported, whereby a region of highly sheared magnetic field near the solar surface becomes unstable and erupts, and show that magnetic reconnection causes the energy release via 'magnetic breakout'-a positive-feedback mechanism between filament ejections and reconnection.
Homologous Confined Filament Eruptions via Magnetic Breakout
- Physics, Geology
- 2008
We describe magnetohydrodynamic simulations of a bipolar active region embedded in the Sun’s global background field and subjected to twisting footpoint displacements concentrated near its polarity…
THE MECHANISMS FOR THE ONSET AND EXPLOSIVE ERUPTION OF CORONAL MASS EJECTIONS AND ERUPTIVE FLARES
- Physics
- 2012
We have investigated the onset and acceleration of coronal mass ejections (CMEs) and eruptive flares. To isolate the eruption physics, our study uses the breakout model, which is insensitive to the…
Vortex and Sink Flows in Eruptive Flares as a Model for Coronal Implosions
- Physics
- 2017
Eruptive flares are sudden releases of magnetic energy that involve many phenomena, several of which can be explained by the standard 2D flare model and its realizations in 3D. We analyze a 3D…
Flux cancellation and coronal mass ejections
- Physics
- 2003
Time dependent magnetohydrodynamic computations of the flux cancellation mechanism are presented. Previous authors have discussed this mechanism as a possible cause for the formation of prominences…
Onset of the Magnetic Explosion in Solar Flares and Coronal Mass Ejections
- Physics
- 2001
We present observations of the magnetic field configuration and its transformation in six solar eruptive events that show good agreement with the standard bipolar model for eruptive flares. The…
NUMERICAL SIMULATIONS OF HELICITY CONDENSATION IN THE SOLAR CORONA
- Physics
- 2015
The helicity condensation model has been proposed by Antiochos to explain the observed smoothness of coronal loops and the observed buildup of magnetic shear at filament channels. The basic…