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| Titel |
Observational evidence of a CME distortion directly attributable to a structured solar wind |
| VerfasserIn |
Neel P. Savani, M. J. Owens, A. P. Rouillard, R. J. Forsyth, J. A. Davies |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250032387
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| Zusammenfassung |
| We present observational evidence of the near-Sun distortion of a coronal mass ejection
(CME) by the ambient solar wind into a concave-outward structure. On November 14 2007, a
CME was observed by coronagraphs onboard the STEREO-B spacecraft, possessing a
circular cross-section. Subsequently the CME passed through the field of view of the
STEREO-B Heliospheric Imagers where it was observed to distort into an increasingly
concave-outward structure. The CME observations are compared to an analytical flux rope
model constrained by a MHD solar wind solution. The resultant bimodal speed profile is used
to kinematically distort a circular structure that replicates the initial topology of the CME.
The CME topology is found to change rapidly over a relatively short distance. This indicates
an approximate radial distance in the heliosphere where the solar wind forces begin to
dominate over the magnetic forces of the CME influencing the topology of the CME. |
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