Grzegorz Michalek
Astronomical Observatory, Jagiellonian University, Krakow,
Poland
A statistical analysis of 588 flare-associated CMEs is presented. We demonstrated the there are two types of the flare-associated CMEs: CMEs which follow and precede flares onsets. We shown that the both samples have quite different characteristics. The first type of CMEs tend to be decelerated (median acceleration = -5.0 ms-2), faster (median velocity = 519 kms-1), and physically related to flares (a correlation coefficient between CME energy and the peak of X-ray flare = 0.80). The CMEs preceding associated flares are mostly accelerated (median acceleration = 5.4 ms-2), slightly slower (median velocity = 487 kms-1), and poorly related to flares (a correlation coefficient between CME energy and the peak of X-ray flare = 0.12). These two types of flare-associated CMEs demonstrate that the magnetic reconnection, which influences the CMEs acceleration, could be significantly different for the both sets of data.