Physics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsp43c..02c&link_type=abstract
American Geophysical Union, Spring Meeting 2005, abstract #SP43C-02
Physics
7513 Coronal Mass Ejections, 7519 Flares, 7524 Magnetic Fields, 7835 Magnetic Reconnection, 7843 Numerical Simulation Studies <!: : : : : : : : : : >, 7509 Corona, 7843 Numerical Simulation Studies
Scientific paper
We present the continuing progress of the numerical simulations of the breakout model for coronal mass ejection initiation. To validate the 3D spherical ARMS code we have run the 2.5D breakout problem and compare the eruption to the published 2D results. The ARMS 2.5D CME also forms a large magnetic island ahead of the erupting plasmoid due to the code's excellent maintenance of equatorial symmetry. Progress on the fully 3D breakout problem is also discussed. To build up enough magnetic free energy for an eruption the active region field must be strong with a steep gradient near the polarity inversion line and the shear must be highly concentrated there. This requires adaptive griding techniques. In the current simulation, the active region to background field ratio is 20-to-1 and the neutral line is long compared to the active region width. We present the evolution of this topology under Br-conserving shearing flow and discuss implications for a 3D eruption. This work is supported by NASA and ONR. BJL is supported by NASA GSRP grant NGT5-50453.
Antiochos Spiro K.
Cheng C. Z.
Choe Gwang-Son
DeVore Richard C.
Lee Julian
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