Influence of random magnetic field on solar global oscillations: The incompressible f-mode

Abstract

The discrepancies between theoretically predicted and observed frequencies of solar global oscillations (e.g. p- and f-modes) have attracted major attention in the past decades. The f-mode is essentially a surface wave hence the mode frequencies are less likely to be influenced by the solar stratification. Most probably then the discrepancies are the result of some near surface mechanism(s) such as interactions with surface or sub-surface magnetic fields and flows. In the following we explore whether the small-scale photospheric magnetic fields, sometimes also called the magnetic carpet, may be part of the explanation for the apparent frequency paradox.