Solar Cycle Variations of p-Mode Frequencies

Details Solar Cycle Variations of p-Mode Frequencies Solar Cycle Variations of p-Mode Frequencies

2004-05-10

arxiv.org/abs/astro-ph/0405175v1

Astrophys.J. 624 (2005) 420-427

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1086/428925

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.

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