Compare CME-induced mass-loss and obscuration dimming properties

Compare and characterize mass-loss coronal dimming and obscuration dimming associated with coronal mass ejections, quantifying their relative timing, depth, duration, morphology, and spectral dependence to establish distinguishing observational signatures and physical relationships.

Background

The report distinguishes two dimming mechanisms observed with solar and stellar CMEs: mass-loss coronal dimming resulting from plasma evacuation, and obscuration dimming caused by absorption from cool, optically thick erupting material.

A systematic, comparative framework would enable reliable CME identification in unresolved stellar observations, improve event characterization, and help constrain CME masses and kinematics from dimming light curves.

References

Despite its distinct characteristics, a direct comparison of the properties of mass-loss and obscuration dimming in relation to CMEs remains an open research question.

The Exospace Weather Frontier  (2511.02871 - Loyd et al., 4 Nov 2025) in Section 5.5.4.1