Oscillation Dynamics in Short-Lived Facula Regions during Their Lifetime

TL;DR

This study investigates oscillation behaviors in short-lived facula regions during their evolution, revealing cycle-dependent frequency dominance and linking low-frequency oscillations to coronal loop foot points.

Contribution

It provides new insights into the oscillation dynamics of facula regions across different solar activity cycles and their relation to coronal structures.

Findings

Low-frequency oscillations dominate early in current cycle faculae.

Five-minute oscillations dominate early in previous cycle faculae.

Low-frequency oscillations are linked to coronal loop foot points.

Abstract

We performed a multi-wave study of the oscillation dynamic in short-lived facula regions during their lifetime. We studied oscillations in five regions, three of which belonged to the beginning of the current solar activity cycle, and two of them existed at the end of the previous cycle. We found that in the facula regions of the current cycle, low-frequency 1-2 mHz oscillation dominated at the early stages of the faculae formation, while in the regions of the previous cycle, five-minute oscillations dominated at this stage. At the maximal development phase of all the facula regions, the locations of observed low frequencies are closely related to those of the coronal loops. These results support the version that the sources of the low-frequency oscillations in loops lie loops' foot points.