Sources of quasi-periodic propagating disturbances above a solar polar coronal hole

TL;DR

This study investigates the origin of quasi-periodic propagating disturbances in solar polar coronal holes, providing evidence that spicular activities in the transition region trigger these disturbances in the corona.

Contribution

The paper demonstrates that spicules in the solar transition region are a key source of coronal propagating disturbances, using analysis of AIA/SDO data.

Findings

Spicular activities are linked to coronal PDs.

Spicules in the transition region trigger coronal disturbances.

Evidence from AIA data supports the spicule-PD connection.

Abstract

Quasi-periodic propagating disturbances (PDs) are ubiquitous in polar coronal holes on the Sun. It remains unclear as to what generates PDs. In this work, we investigate how the PDs are generated in the solar atmosphere by analyzing a fourhour dataset taken by the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory (SDO). We find convincing evidence that spicular activities in the solar transition region as seen in the AIA 304 {\AA} passband are responsible for PDs in the corona as revealed in the AIA 171 {\AA} images. We conclude that spicules are an important source that triggers coronal PDs.