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The role of magnetic fields in the scattering of p-modes

机译:The role of magnetic fields in the scattering of p-modes

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摘要

Aims. We determine the direct and indirect effects of magnetic field on p-mode scattering.Methods. We solve a set of magnetohydrodynamic equations using the Born approximation to determine phase shifts in p-modes dueto a region of inhomogeneity. The region of inhomogeneity is a magnetic flux tube with the characteristics of flaring field lines. Thisenables us to investigate the magnetic field effects on the phase shifts.Results. The magnetic configuration of our flux tube model plays a vital role in the phase shifts of p-modes. The suppression of soundspeed and pressure within the flux tube region is not the only factor to consider in the scattering of p-modes. There is a direct effectof the magnetic fields caused by the flaring of field lines on phase shifts.

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