Austrian Early Career Conference 2024

Contribution:
Poster

Authors:
A. Razquin [1]; A. M. Veronig [1,2]

Affiliations:
1: Institute of Physics, University of Graz, Universitätsplatz 5, Graz, 8010, Austria; 2: Kanzelhöhe Observatory of Solar and Environmental Research, University of Graz, Kanzelhöhe 19, Treffen, 9521, Austria

Title:
Coronal dimming evolution and properties in soft X-rays as compared to EUV

Abstract:
Coronal dimmings are regions of transiently reduced emissions observed in extreme ultraviolet (EUV) and soft X-ray (SXR) wavelengths interpreted as the decrease of coronal density and plasma evacuation due to the onset of coronal mass ejections (CMEs). CMEs are large structures of plasma and magnetic fields expelled from the Sun into the heliosphere. Solar CMEs are the main cause of space weather disturbances in Earth's atmosphere and magnetosphere. Thus, the development of diagnostic tools for coronal dimmings can yield additional information regarding CMEs, which can in turn be used for the detection of Earth-directed CMEs and stellar CMEs. We present a study of coronal dimmings associated with Earth-directed CMEs as observed in SXR by the XRT instrument onboard Hinode. We compare the derived characteristic quantities with those observed in EUV by AIA onboard the Solar Dynamics Observatory. By using these two instruments we observe how the solar corona restructures and refills with plasma after a CME eruption at different temperatures.