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Coronal dimmings and what they tell us about solar and stellar coronal mass ejections

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arxiv 2505.19228 v1 pith:AFWVA3TP submitted 2025-05-25 astro-ph.SR

Coronal dimmings and what they tell us about solar and stellar coronal mass ejections

classification astro-ph.SR
keywords coronaldimmingstheymassejectionscmesdiagnosticsdiscuss
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Coronal dimmings associated with coronal mass ejections (CME) from the Sun have gained much attention since the late 1990s when they were first observed in high-cadence imagery of the SOHO/EIT and Yohkoh/SXT instruments. They appear as localized sudden decreases of the coronal emission at extreme ultraviolet (EUV) and soft X-ray (SXR) wavelengths, that evolve impulsively during the lift-off and early expansion phase of a CME. Coronal dimmings have been interpreted as "footprints" of the erupting flux rope and also as indicators of the coronal mass loss by CMEs. However, these are only some aspects of coronal dimmings and how they relate to the overall CME/flare process. The goal of this review is to summarize our current understanding and observational findings on coronal dimmings, how they relate to CME simulations, and to discuss how they can be used to provide us with a deeper insight and diagnostics of the triggering of CMEs, the magnetic connectivities and coronal reconfigurations due to the CME as well as the replenishment of the corona after an eruption. In addition, we go beyond a pure review by introducing a new, physics-driven categorization of coronal dimmings based on the magnetic flux systems involved in the eruption process. Finally, we discuss the recent progress in studying coronal dimmings on solar-like and late-type stars, and to use them as a diagnostics for stellar coronal mass ejections and their properties.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

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    astro-ph.SR 2026-07 conditional novelty 6.5

    Under solar-scaled magnetograms with E_FR ∝ ⟨B★⟩², CME speed and mass rise roughly as v_CME ∝ ⟨B★⟩ and M_CME ∝ ⟨B★⟩^1.5, driven mainly by the upward Lorentz force.

  2. ESCAPE: a small explorer mission to study the stellar drivers of exoplanet evolution

    astro-ph.EP 2026-08 conditional novelty 6.0

    ESCAPE is a proposed NASA Small Explorer that would measure EUV spectra of about 300 nearby stars to constrain stellar EUV irradiance and coronal mass ejection rates affecting exoplanet habitability.

  3. Reconstruction of annual solar irradiance over the last three millennia

    astro-ph.SR 2026-05 unverdicted novelty 6.0

    Physics-based annual TSI reconstruction over three millennia yields a maximum difference of 1.04 W/m² in 50-year running means.

  4. Formation of a Coronal Hole by a quiet-Sun Filament Eruption

    astro-ph.SR 2025-09 conditional novelty 6.0

    A quiet-Sun filament eruption created a coronal dimming that evolved into a persistent coronal hole, migrating 150 arcseconds to a region of modeled open magnetic flux and surviving for more than one solar rotation.

  5. The ASPIICS solar coronagraph aboard the Proba-3 formation flying mission. Scientific objectives and instrument design

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  6. Probing Flare-Associated Eruptions on AB Doradus via X-ray Absorption Variations

    astro-ph.SR 2026-07 conditional novelty 4.5

    Complex overlapping X-ray flares on AB Dor show phase-locked NH enhancements interpreted as transient cool absorbing plasma from eruptive coronal restructuring, while classical flares do not.