Volume 494, Number 1, January IV 2009
|Page(s)||263 - 268|
|Published online||20 November 2008|
Two types of flare-associated coronal mass ejections
Astronomical Observatory of Jagiellonian University, Cracow, Poland e-mail: firstname.lastname@example.org
Accepted: 15 October 2008
Aims. Here, we study the relationship between flares and CMEs.
Methods. For this purpose a statistical analysis of 578 flare-associated CMEs is presented. We considered two types of flare-associated CMEs: CMEs that follow and precede flare onset.
Results. We shown that both samples have quite different characteristics. The first type of CMEs tends to be decelerated (median acceleration = –5.0 m s-2), faster (median velocity = 519 km s-1), and physically related to flares (a correlation coefficient between the energy of the CME and the peak of the X-ray flare = 0.80). The CMEs preceding associated flares are mostly accelerated (median acceleration = 5.4 m s-2), slightly slower (median velocity = 487 km s-1), and poorly related to flares (a correlation coefficient between the energy of the CME and the peak of the X-ray flare = 0.12).
Conclusions. These two types of flare-associated CMEs demonstrate that magnetic reconnection, which influences the CME acceleration, could be significantly different in the two types of events.
Key words: Sun: coronal mass ejections (CMEs) / Sun: flares
© ESO, 2009
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.