Evolution of a Coronal Mass Ejection and its Magnetic Field in Interplanetary Space
Abstract
This Letter presents the first theoretical study of the dynamics of a coronal mass ejection (CME) observed by STEREO-A/B. The CME was continuously tracked by SECCHI-A, providing position-time data from eruption to 1 AU. The ejecta was intersected by STEREO-B at 1 AU, where the magnetic field and plasma parameters were measured. The observed CME trajectory and the evolution of the CME magnetic field are modeled using the semianalytic erupting flux-rope model. It is shown that the best-fit theoretical solution is in good agreement—within 1% of the measured CME trajectory in the 1 AU field of view—and is consistent with the in situ magnetic field and plasma data at 1 AU.
- Publication:
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The Astrophysical Journal
- Pub Date:
- June 2010
- DOI:
- 10.1088/2041-8205/715/2/L80
- Bibcode:
- 2010ApJ...715L..80K
- Keywords:
-
- solar-terrestrial relations;
- stars: flare;
- Sun: corona;
- Sun: coronal mass ejections: CMEs;
- Sun: flares;
- Sun: particle emission