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Paper: Seismology of Small-Scale Magnetic Features using Numerical Simulation
Volume: 478, Fifty Years of Seismology of the Sun and Stars
Page: 259
Authors: Vigeesh, G.; Jackiewicz, J.
Abstract: We present results of 3D magnetohydrodynamic simulations as part of a preliminary study aimed at understanding the interaction of seismic waves with small-scale magnetic flux concentrations on the Sun. A model solar atmosphere without magnetic fields (“Quiet Sun” model) and a model with magnetic fields are constructed. We consider the solar surface-gravity waves (f-mode) that are naturally excited in both the simulated models and use them to measure travel times between different locations on the surface. When compared to the field-free simulation, we observe that a strong f-mode scattering occurs in the presence of magnetic fields and results in travel-time shifts. With the help of realistic numerical simulations, we show the seismic influence of small-scale magnetic features in travel-time differences and its possible effects on the helioseismic measurements of the structure and dynamics of the solar interior.
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