The relationship between prominence eruptions and coronal mass ejections

Physics

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Scientific paper

The SOHO observations with LASCO and EIT present an ideal opportunity to study the relationship between prominence eruptions and coronal mass ejections (CME). High-cadence measurements of prominence eruptions demonstrate that the prominence eruption is not generally the cause of the associated CME, but that it is more probable that the destabilisation of the CME in fact releases the constraints on the prominence, causing it to erupt. We report here selected observations of associated CMEs and prominence eruptions covering the period of SOHO operations from mid-January 1996 to October 1999. In addition to the causality, we find that in general the projected speed of the prominence eruption matches fairly closely the projected speed of the associated CME, but it is always lower. Furthermore, the prominence eruption is generally simply one facet of the coronal transient activity, of which there are often several other discrete parts. The prominence eruption is also generally offset in heliolatitude from the centre of the CME.

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