The Surface Amplitudes and Frequencies of p-Mode Oscillations in Active Regions

Details The Surface Amplitudes and Frequencies of p-Mode Oscillations in Active Regions The Surface Amplitudes and Frequencies of p-Mode Oscillations in Active Regions

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...476..392h&link_type=abstract

Astrophysical Journal v.476, p.392

Astronomy and Astrophysics

Astronomy

28

Sun: Activity, Sun: Magnetic Fields, Sun: Oscillations

Scientific paper

It is well established that the surface amplitudes of solar p-mode oscillations are reduced in regions of magnetic activity. In this paper, we examine the conjecture that this reduction is produced by direct modification of the surface values of the p-mode eigenfunctions, rather than changes in the mode energies or alterations in the spectral line formation process. We calculate the oscillation modes of a solar model with a horizontal magnetic field, convection, and radiative diffusion. We find that magnetic fields with strengths characteristic of solar active regions can produce the observed decrease of surface power.

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