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

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 Å passband are responsible for PDs in the corona as revealed in the AIA 171 Å images. We conclude that spicules are an important source that triggers coronal PDs.

Accepted for publication in ApJL

References in corpus (7)

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• Stochastic transients as a source of quasi-periodic processes in the solar atmosphere
• First Imaging Observation of Standing Slow Wave in Coronal Fan loops
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• A Statistical Study on The Frequency-Dependent Damping of Slow-mode Waves in Polar Plumes and Interplumes
• Observations of upward propagating waves in the transition region and corona above Sunspots
• Modelling the connection between propagating disturbances and solar spicules
• Damping and power spectra of quasi-periodic intensity disturbances above a solar polar coronal hole
• The Relation between Solar Spicules and Magnetohydrodynamic Shocks
• Statistical properties of Hα jets in the polar coronal hole and their implications in coronal activities
• Dynamics in the transition region beneath active region upflows viewed by IRIS
• Population of Bright Plume Threads in Solar Polar Coronal Holes
• On the Relationship between Solar Spicules and Propagating Coronal Disturbances: The Role of Shocks
• High-Frequency Magnetohydrodynamic Waves with Substantial Energy in the Solar Polar Corona