ÖPG-CMD Joint Meeting 2026

Coronal dimmings and their relevance for solar and stellar coronal mass ejections

Sep 24, 2026, 12:20 PM

12m

HS 11.03 (University of Graz)

3) Contributed talk M38 - Astronomy and Astrophysics across Austria Mini-Colloquium

Speaker

Prof. Astrid Veronig (University of Graz)

Description

Coronal dimmings are transient decreases of the coronal brightness observed in extreme ultraviolet (EUV) and soft X-ray (SXR) wavelengths that occur during the initial stages of a coronal mass ejection (CME). Coronal dimmings are an effect of field line opening, expansion and mass loss during a CME. However, their diagnostics potential reaches far beyond those aspects.

In this contribution, we will present selected results along three main lines:

1. how coronal dimmings are related to decisive properties of a CME,
2. how they can give us insight into the magnetic flux systems that are involved in the eruption,
3. and how they can be used to detect and characterize stellar coronal mass ejections.