Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsh41b1671k&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SH41B-1671
Astronomy and Astrophysics
Astrophysics
[7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections, [7519] Solar Physics, Astrophysics, And Astronomy / Flares
Scientific paper
Although both solar flares and CMEs are widely believed to arise as a result of magnetic energy liberation in the solar corona, the temporal, structural and causal relationship between the two eruptive phenomena is not yet well understood. The objective of this study is to clarify how flare and CME are mutually related in a realistic condition, in terms of a realistic numerical simulation based on the nonlinear force-free field model of coronal magnetic field. First, we calculated a quasi-force-free field of Active Region NOAA 10930 by applying an advanced magnetofrictional algorithm to the unprecedented high-resolution vector magnetoram observed by Solar Optical Telescope (SOT) onboard Hinode six hours prior to the onset of a powerful X3.4-class flare occurred on 2006 December 13. Second, we performed a three-dimensional magneto-hydrodynamic (MHD) simulation by imposing slow converging motion on the magnetic neutral line of the quasi-force-free field. The simulation is able to well reproduce the onset of magnetic reconnection, the formation of cusp structure corresponding to flaring loop, and the ejection of plasmoid. Finally, based on the simulation results, we have analyzed the energy transport caused by reconnection by visualizing the three-dimensional structure of Poynting vector in the active region. The results clearly indicate that magnetic energy propagates along a large scale magnetic field out of the active region after the plasmoid ejection. It implies that the presence of large scale magnetic field, which connects the inside and the outside of active region, might play an important role for the formation of CME.
Inoue Susumu
Kusano Kanya
Shiota Daikou
Yamamoto Tadahiro
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