3D Coronal Mass Ejection Reconstruction Improved with Polarimetric Tomography

This research presents a discrete tomography method for reconstructing three-dimensional coronal mass ejection (CME) density structure. The method is tested using synthetic coronagraph imagery from the CORHEL model, combining images from multiple spacecraft. The study demonstrates that increasing the number of observing spacecraft reduces the mean relative absolute error (MRAE) in the reconstructed density. Furthermore, polarimetric reconstructions generally outperform non-polarimetric reconstructions. The ability to accurately localize the CME front is also improved with polarimetric data. The results suggest that at least four spacecraft are required for accurate 3D CME structure determination. While the inclusion of out-of-ecliptic observers increases the inversion volume, no strong evidence of improvement in accuracy was found. These findings have significant implications for space weather forecasting and the development of more effective strategies for mitigating the impact of solar storms on Earth and space-based assets. The use of polarimetric tomography in conjunction with multi-spacecraft observations represents a promising avenue for advancing our understanding of CME dynamics and improving our ability to predict their arrival at Earth.

*Transparency Disclosure: The AI model (Gemini 2.5 Flash) generated the 'deep_analysis' section based on the provided source content. The analysis aims to provide an objective summary of the key findings and implications of the study, focusing on its potential impact on space weather forecasting and CME research. No subjective opinions or external information were incorporated.*

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