Variation of Oscillation Mode Parameters over the Solar Cycle 23: An Analysis on Different Time Scales

TL;DR

This study examines how solar oscillation mode parameters vary over the solar cycle 23 across different time scales, revealing correlations with solar activity and energy transfer dynamics.

Contribution

It provides a detailed analysis of mode parameter variations over multiple time scales and their relation to solar activity, offering new insights into solar oscillation behavior.

Findings

Frequency shifts correlate with solar activity proxies.

Mode energy is anti-correlated with solar activity.

Energy supply rate remains constant over the cycle.

Abstract

We investigate the variation in the mode parameters obtained from time series of length 9, 36, 72 and 108 days to understand the changes occurring on different time-scales. The regression analysis between frequency shifts and activity proxies indicates that the correlation and slopes are correlated and both increase in going from time series of 9 to 108 days. We also observe that the energy of the mode is anti-correlated with solar activity while the rate at which the energy is supplied remains constant over the solar cycle.