Physics
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sh42a05m&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #SH42A-05
Physics
7513 Coronal Mass Ejections, 7531 Prominence Eruptions
Scientific paper
Separated by an interval of 10 days, two major filaments erupted from the same filament channel. The first began on the disk near the east limb; the second also began on the disk but near the west limb. Both erupting filaments were exceptionally bright with complex helical structure. The second filament formed at the location of the first eruptive and within one day after the first eruptive. The orientation of the filament channel was SW to NE extending out of NOAA active region 9262 with an average angle of 35 degrees relative to the solar equator. These circumstances offer the unusual opportunity to study similar filament eruptions and their corresponding CMEs from different viewing directions and to try to determine if the apparent structure of the events is strongly dependent on viewing direction. The leading front of the CME with the east limb eruptive was a faint arc in the EIT FeXII 195A images. In the LASCO C2 field, a CME was found with the first eruptive although it was not reported on the LASCO preliminary CME listing; it consisted of a succession of ejecta along nearly radial trajectories and hence did not look like most published examples of CMEs. The CME with the west limb eruptive had the form of a classical arch but lacked a clear cavity. Both events were also nearly concurrent with but slightly lagging an adjacent CME. In these examples, the large difference in the appearance of the CMEs could be due at least in part to the difference in viewing direction. However, some of the differences could also be due to interaction with the adjacent CMEs at different locations. In the LASCO C3 fields of view, each of the subject events appeared to merge with an adjacent CME into a single larger or longer-enduring CME. The subject events are consistent with the idea of triggering by interaction with the adjacent CMEs.
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