Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2011-09-29
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
Submitted to ApJ, 9 pages, 11 figures
Scientific paper
We present results of a three-dimensional numerical simulation of magnetohydrodynamic wave propagation in a solar magnetic flux tube. Our study aims at understanding the properties of various MHD wave modes generated by different photospheric motions. We consider two scenarios observed in the solar photosphere, namely, granular buffeting and vortex-like motion, among the simplest mechanism for the generation of waves within a strong magnetic flux concentration. We show that, granular buffeting is likely to produce stronger slow and fast magneto-acoustic waves as compared to swirl motions. Correspondingly, the energy flux transported differ as a result of this driving motions. We also show that the waves generated by granular buffeting are likely to produce stronger emission in the chromospheric network. We argue that different mechanisms of wave generation are active during the evolution of a magnetic element in the intergranular lane, resulting in temporally varying emission at chromospheric heights.
Erdelyi Robert
Fedun Viktor
Hasan Sirajul S.
Vigeesh G.
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