Helioseismic Probing of Solar Variability: The Formalism and Simple Assessments
Helioseismic Probing of Solar Variability: The Formalism and Simple Assessments
We derive formulae connecting the frequency variations in the spectrum of solar oscillations to the dynamical quantities that are expected to change over the solar activity cycle. This is done for both centroids and the asymmetric part of the fine structure (so-called even-a coefficients). We consider the near-surface, small-scale magnetic …