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arXiv · 1008.2531

3D Numerical Simulations of f-Mode Propagation Through Magnetic Flux Tubes

K. Daiffallah·T. Abdelatif·A. Bendib·R. Cameron·L. Gizon
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Abstract

Three-dimensional numerical simulations have been used to study the scattering of a surface-gravity wave packet by vertical magnetic flux tubes, with radii from 200 km to 3 Mm, embedded in stratified polytropic atmosphere. The scattered wave was found to consist primarily of m=0 (axisymmetric) and m=1 modes. It was found that the ratio of the amplitude of these two modes is strongly dependant on the radius of the flux tube: The kink mode is the dominant mode excited in tubes with a small radius while the sausage mode is dominant for large tubes. Simulations of this type provide a simple, efficient and robust way to start understanding the seismic signature of flux tubes, which have recently began to be observed.

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K. Daiffallah, T. Abdelatif, A. Bendib, R. Cameron, L. Gizon. 2010-10-29. 3D Numerical Simulations of f-Mode Propagation Through Magnetic Flux Tubes. https://doi.org/10.1007/s11207-010-9666-5

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