Do Active Regions Modify Oscillation Frequencies?

TL;DR

This study examines how active regions on the Sun influence local oscillation frequencies, revealing that their effects vary significantly between different phases of the solar activity cycle.

Contribution

It provides new insights into the phase-dependent relationship between solar magnetic activity and oscillation frequency shifts.

Findings

Frequency shifts correlate differently with magnetic activity during different solar cycle phases.

Active regions have a measurable impact on high-degree mode frequencies.

The correlation between activity and frequency shifts varies with the solar cycle phase.

Abstract

We investigate the variation of high-degree mode frequencies as a local response to the active regions in two different phases of the solar activity cycle. We find that the correlation between frequency shifts and the surface magnetic activity measured locally are significantly different during the two activity periods.