Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009a%26a...501.1131g&link_type=abstract
Astronomy and Astrophysics, Volume 501, Issue 3, 2009, pp.1131-1137
Astronomy and Astrophysics
Astrophysics
Sun: Magnetic Fields, Sun: Helioseismology, Sun: Oscillations, Magnetohydrodynamics (Mhd), Scattering
Scientific paper
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 due to a region of inhomogeneity. The region of inhomogeneity is a magnetic flux tube with the characteristics of flaring field lines. This enables 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 sound speed and pressure within the flux tube region is not the only factor to consider in the scattering of p-modes. There is a direct effect of the magnetic fields caused by the flaring of field lines on phase shifts.
Gascoyne Andrew
Jain Rahul
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