What question did this study set out to answer?

This research aims to evaluate the correlation between coronal dimmings and coronal mass ejections (CMEs) to improve detection methods for stellar CMEs.

May 30, 2026

The Relationship of Coronal Dimmings with CMEs and the Implication in Detecting Stellar CMEs

Key Points

This research aims to evaluate the correlation between coronal dimmings and coronal mass ejections (CMEs) to improve detection methods for stellar CMEs.
Examination of coronal dimmings detected by Solar Demon from Atmospheric Imaging Assembly images on Solar Dynamics Observatory.
Assessment of the association rates of dimmings with CMEs, flares, and EUV waves.
Coronal dimming is associated with CMEs or flares at a rate of approximately 75%.
Dimming associations with EUV waves occur at around 35%.
The use of EUV irradiance data may enhance the isolation and detection of dimmings.

Abstract

Abstract Coronal mass ejections (CMEs) play a significant role in space weather. In order to evaluate space weather effects, it is important to understand the origin of CMEs in the solar atmosphere. Among various proxies for CMEs in the low corona, the coronal dimming observed as intensity deficit in extreme ultraviolet (EUV) or soft X-ray wavelengths is thought to be the most reliable observable. We examine dimmings detected automatically by Solar Demon in images taken by the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory (SDO), and associate strong dimmings with CMEs, flares and EUV waves. The association rate of dimmings with either CMEs or flares is about 75%, and that with EUV waves is about 35%. We also discuss the complementary use of EUV irradiance data, for example, from the Extreme Ultraviolet Experiment on board SDO to isolate dimmings. This may have implications in detecting CMEs from stars.

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