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| Titel |
Causal relationships between eruptive prominences and coronal mass ejections |
| VerfasserIn |
B. Filippov, S. Koutchmy |
| 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 ; 26, no. 10 ; Nr. 26, no. 10 (2008-10-15), S.3025-3031 |
| Datensatznummer |
250016250
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| Publikation (Nr.) |
 copernicus.org/angeo-26-3025-2008.pdf |
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| Zusammenfassung |
| A close association between eruptive prominences and CMEs, both slow and
fast CMEs, was reported in many studies. Sometimes it was possible to follow
the material motion starting from the prominence (filament) activation to
the CME in the high corona. Remnants of the prominence were found in the
bright core of the CME. However, detailed comparisons of the two phenomena
reveal problems in explaining CMEs as a continuation of filament eruptions
in the upper corona. For example, the heliolatitudes of the disappeared
filaments and subsequent coronal ejections sometimes differ by tens of
degrees. In order to clear up the problems appearing when
considering this association EP-CME, we tentatively analyse the more
general question of the dynamics of the generic magnetic flux rope.
Prominences and filaments are the best tracers of the flux ropes in the corona long
before the beginning of the eruption. A twisted flux rope is held by the
tension of field lines of photospheric sources until parameters of the
system reach critical values and a catastrophe happens. We suggest that the
associated flux rope height above the photosphere is one of these parameters
and that it is revealed by the measured height of the filament. 80
filaments were analysed and we found that eruptive prominences were near the
so-called limit of stability a few days before their eruptions. We
suggest that a comparison of actual heights of prominences with the
calculated critical heights from magnetograms could be systematically used
to predict filament eruptions and the corresponding CMEs. |
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