The Evolution of the Electric-Field Distribution During the CME/Two-Ribbon-Flare Event

Details The Evolution of the Electric-Field Distribution During the CME/Two-Ribbon-Flare Event The Evolution of the Electric-Field Distribution During the CME/Two-Ribbon-Flare Event

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh44a1731y&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SH44A-1731

Other

7513 Coronal Mass Ejections (2101), 7519 Flares, 7526 Magnetic Reconnection (2723, 7835), 7835 Magnetic Reconnection (2723, 7526)

Scientific paper

The two-ribbon-flare (TRF) associated electric field near the solar surface can be estimated from the observed footpoint motion of the two-ribbon flares and the observed magnetic field on the solar surface. Based on the steady reconnection model, the estimated electric field on the solar surface is equal to the electric field near the reconnecting current sheet (RCS). The electric field near the RCS can be used to calculate the magnetic flux change rate during the CME/TRF event. The electric field near the RCS is also responsible for the generation of the relativistic particles and the acceleration of the coronal mass ejection (CME). Therefore, it is important to know how to correctly estimate the electric field at the RCS during a CME/TRF event. In this investigation, we use a two-dimensional magnetohydrodynamic simulation to study the evolution of the electric-field distribution during the CME/TRF event. Our preliminary results indicate that the electric field is not always uniform during the CME/TRF event. Particularly, the electric field above and below the reconnection site are usually different from each other. Our results might provide an explanation to the poor correlation between the estimated electric field on the solar surface and the acceleration of the CME in the previous observations (Jing et al., 2005).

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