CMEs Observed Continuously from the Lower Corona to the Far Corona
Title | CMEs Observed Continuously from the Lower Corona to the Far Corona |
Publication Type | Journal Article |
Year of Publication | 2000 |
Authors | Delannée, C., DelaboudinièRe J.-P., and Lamy P. |
Journal | Advances in Space Research |
Volume | 26 |
Pagination | 67-70 |
Abstract | A campaign of observations with EIT on board SOHO called ``CME watch'', is designed to observe the whole sun surface in 195 A&ring i.e. in a Fe XII emission line, every 17 minutes. In order to analyze the events, we also used He II and coronagraph observations of 97/11/03. By this way, the very beginning of some CMEs was observed. The ejections were seen in Fe XII as a dark bubble propagating in the corona above a prominence, and dimmings produced near an active region and propagating on the solar surface. Two of the ejections coming from the active region were produced with a very short time of delay (1 hour). All the ejections were associated to a CME. However, one CME was not related to a Fe xII low corona event, but maybe this CME had its origin behind the limb. The CME associated with the prominence was quite slow (50 km s$^{-1}$) and the ones associated with the active region were quite fast (114-490 km s$^{-1}$). This analysis permitted a better identification of the different CMEs appearing in the coronagraph field of view |
DOI | 10.1016/S0273-1177(99)01027-3 |
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