Solar Cycle Variations of p-Mode Frequencies

Abstract

Observations show that the solar p-mode frequencies change with the solar cycle. The horizontal-phase-velocity dependence of the relative frequency change, scaled by mode mass, provides depth information on the perturbation in the solar interior. We find that the smoothed scaled relative frequency change varies along the solar cycle for horizontal phase velocities higher than a critical value, which corresponds to a depth near the base of the convection zone. This phenomenon suggests that the physical conditions in a region near the base of the convection zone change with the solar cycle.

References in corpus (2)

• Solar-cycle variation of the sound-speed asphericity from GONG and MDI data 1995-2000
• An Upper Limit on the Temporal Variations of the Solar Interior Stratification

Cited by in corpus (11)

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• Structure of the near-surface layers of the Sun: asphericity and time variation
• Evidence of solar-cycle related structural changes in the solar convection zone
• On the magnetic field required for driving the observed angular-velocity variations in the solar convection zone
• Astrophysics in 2005
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