The Emergence of a Twisted Ω-Tube into the Solar Atmosphere

  • Fan Y
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Abstract

We report the results of a three-dimensional MHD simulation of the dynamic emergence of a twisted, Ω-shaped tube from the top layer of the solar convection zone into the atmosphere and the corona. It is found that the tube segment at the apex of the Ω-tube expands into the stably stratified atmosphere as a result of the magnetic buoyancy instability (or the Parker instability). Our simulation of the emergence of a left-hand-twisted Ω-tube reproduces several major observed features of a newly developing active region described by Strous and coworkers, including the orientation of the arch-filament system, the distribution of the vertical magnetic field on the photosphere, the locations of sunspot formation, and the organized shear flow pattern in the photospheric horizontal velocity field.

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APA

Fan, Y. (2001). The Emergence of a Twisted Ω-Tube into the Solar Atmosphere. The Astrophysical Journal, 554(1), L111–L114. https://doi.org/10.1086/320935

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