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| Titel |
Magnetosheath cavities: case studies using Cluster observations |
| VerfasserIn |
F. T. Katırcıoğlu, Z. Kaymaz, D. G. Sibeck, I. Dandouras |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 27, no. 10 ; Nr. 27, no. 10 (2009-10-05), S.3765-3780 |
| Datensatznummer |
250016667
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| Publikation (Nr.) |
 copernicus.org/angeo-27-3765-2009.pdf |
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| Zusammenfassung |
| This paper presents examples of magnetosheath cavities in Cluster spacecraft
observations. The cavities are accompanied by high energy particles in the
magnetosheath and characterized by depressed magnetic fields and densities.
Flow speeds decrease and temperatures increase within the cavities. All
magnetosheath parameters show increased variability within the cavities when
the energetic particle flux is high. We predict outward motion of the
magnetopause boundary in response to the decreases in the magnetosheath ram
pressure caused by the high energy particles within the magnetosheath
cavities. For our events, the magnetopause distance is predicted to be
30% larger during the times of high energy particle flux in the
magnetosheath than that predicted using concurrent upstream solar wind
pressure observations. Our events show no preference to occur for a
particular IMF direction or solar wind plasma condition. |
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