Other
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh23b1639k&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SH23B-1639
Other
7509 Corona, 7513 Coronal Mass Ejections (2101), 7519 Flares
Scientific paper
We do active-region associations of CMEs observed with the SoHO/LASCO during a 1-year rise period of solar cycle 23 (1997-1998) to determine some global magnetic properties of the CME-associated new cycle regions. This is a repetition of a similar study done with CMEs observed by the SMM coronagraph in 1986- 1987, a time when the numbers of active regions on the disk were small and associations most easily made. At that time it was found that the CME association was low for isolated regions, defined as those with no other active regions located within a 30° range of longitude. The coupled high-latitude regions, those accompanied by high or low-latitude regions within 30° of longitude, were accompanied by many more CMEs. We look for this effect in the LASCO CME data for all CMEs and for fast (> 900 km/s) and wide (> 60 °) CMEs. Both the 1986-87 and 1997-98 rise phases were periods with large fractions of MCs among all ICMEs, so confirmation of the SMM results could yield clues to the possible role of active region interactions in the origins of MCs.
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