Self-similar magnetohydrodynamic solution for the dynamics of magnetic flux emergence |
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| Authors: | M T Song S T Wu H Q Zhang |
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| Institution: | (1) Purple Mountain Observatory, Nanjing, People's Republic of China;(2) Center for Space Plasma and Aeronomic Research and Department of Mechanical and Aerospace Engineering, The University of Alabama in Huntsville, 35899, AL, U.S.A.;(3) Purple Mountain Observatory, Nanjing, People's Republic of China |
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| Abstract: | A model based on a self-similar magnetohydrodynamic (MHD) solution is presented which accounts for the dynamic behavior of the birth of an active region due to the emergence of magnetic flux. The constraints of this model are deduced from observations. Specifically, this self-similar MHD solution explains the observation that plasma flow ascends in one leg and descends in the other leg of an arch filament system (AFS). Furthermore, the solution accounts for the formation of a current sheet in which a slow reconnection may occur that may explain the appearance of bright plages in the neighborhood of an AFS. |
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