34th Solar Physics Division Meeting, June 2003
Session 5 Coronal Mass Ejections I
Poster, Monday, June 16, 2003, 3:30-5:00pm, Mezzanine

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[5.09] Statistical Studies of filament eruptions, flares and CME

J. Jing, G. Yang, H.M. Wang (CFSR/BBSO)

We present results on the statistical studies of filament disappearances from January 1, 1999 to October 31, 2002, with a size of at least 2000 arc sec2, which were detected automatically by a detection program at Big Bear Solar Observatory. With the criterion for inclusion in our study that the H\alpha or EIT/LASCO observation was available during the process of the filament disappearance, 79 events were studied. We compare these events with corresponding GOES soft X-ray time profiles, SGD solar event reports, MDI magnetograms and LASCO movies to determine the relationship between filament disappearances and other phenomena of solar activity. we found that: (1) Excluding 6 events with no corresponding LASCO data, 46 (63%) of the remaining events are associated with CMEs. (2) Active region filament eruptions have considerably higher flare association (91%) and CME association (73%) than quiescent filament eruptions (20% for flare association and 55% for CME association). Of 68 quiescent filament eruptions, filament eruptions are more likely associated with CMEs than flares. (3) 39 (74%) of 53 disk events which can be studied for magnetic field evolution have new flux emergences. New flux emergences appear near the polarity inversion regions associated with the eruptive filaments, within 130 arc sec from the eruptive filaments, and within 15 hours prior to the filament eruption.


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Bulletin of the American Astronomical Society, 35 #3
© 2003. The American Astronomical Soceity.