Two Quasi-periodic Fast-propagating Magnetosonic Wave Events Observed In Active Region NOAA 11167

TL;DR

This study analyzes two quasi-periodic fast-propagating magnetosonic wave events in NOAA 11167, revealing their characteristics, associated eruptions, and potential driving mechanisms through detailed solar observations.

Contribution

It provides the first detailed observational comparison of two QFP wave events with different triggering mechanisms in the same active region.

Findings

Both events have two wave trains with distinct strengths.

The second event involves a flux rope eruption and filament formation.

The funnel-like coronal loop system influences the wave development.

Abstract

We report a detailed observational study of two quasi-periodic fast-propagating (QFP) magnetosonic wave events occurred on 2011 March 09 and 10, respectively. Interestingly, both the two events have two wave trains (WTs): one main and strong (WT-1) whereas the second appears small and weak (WT-2). Peculiar and common characteristics of the two events are observed, namely: 1) the two QFP waves are accompanied with brightenings during the whole stage of the eruptions; 2) both the two main wave trains are nearly propagating along the same direction; 3) EUV waves are found to be associated with the two events. Investigating various aspects of the target events, we argue that: 1) the second event is accompanied with a flux rope eruption during the whole stage; 2) the second event eruption produces a new filament-like (FL) dark feature; 3) the ripples of the two WT-2 QFP waves seem to result from different triggering mechanisms. Based on the obtained observational results, we propose that the funnel-like coronal loop system is indeed playing an important role in the two WT-1 QFP waves. The development of the second WT-2 QFP wave can be explained as due to the dispersion of the main EUV front. The co-existence of the two events offer thereby a significant opportunity to reveal what driving mechanisms and structures are tightly related to the waves.