An observation-based method to model the magnetic field of coronal mass ejections: Geometrical Measurement Toolbox for CMEs (GeoMeTCME)

ÇAVUŞ H., Coban G. C., Raheem A.

Advances in Space Research, 2026 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1016/j.asr.2026.02.100
  • Dergi Adı: Advances in Space Research
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Artic & Antarctic Regions, Compendex, INSPEC, MEDLINE
  • Anahtar Kelimeler: Sun: atmosphere, Sun: corona, Sun: coronal mass ejections (CMEs), Sun: magnetic fields
  • Çanakkale Onsekiz Mart Üniversitesi Adresli: Evet

Özet

Coronal mass ejections (CMEs) are substantial eruptions that originate from the Sun and propagate into the heliosphere. They comprise solar plasma and a magnetic field. The average mass of plasma in these explosions can reach up to billions of tons of plasma, and the embedded magnetic field is more powerful than the background magnetic field of the solar wind. The magnetic field profile of a full-grown CME can be intricate and fluctuate as it traverses space. This paper presents an innovative observation-based methodology and a toolbox for employing geometry to assess the profiles and fluctuations of the magnetic field during CMEs. It is named the Geometrical Measurement Toolbox for Coronal Mass Ejections (GeoMeTCME). GeoMeTCME is a web-based tool designed for the geometric analysis of CME data. The system utilises a methodology similar to the online measurement tool employed by the SOHO LASCO CME Catalogue at the CDAW Data Center. The system continually retrieves CME images from the database and enables users to conduct interactive measurement procedures. For the CMEs we analysed, we found the averaged magnetic field values at the cavity midpoint to be between 0.746 × 10⁻4 T and 2.93 × 10⁻4 T, consistent with the literature.