Shahinaz Yousef

Citation:

Mawad, R., M. Shaltout, M. Yousef, S. Yousef, and M. Ewaida, "Filaments disappearance in relation to coronal mass ejections during the solar cycle 23", Advances in Space Research, vol. 55, pp. 688–695, 2015.

Abstract:

We have studied the relationship between filament disappearances with CMEs during solar period 1996–2010. We used the observed
disappearing filaments in Ha data from Meudon given in NOAA, and coronal mass ejections data (CMEs) from SOHO/LASCO. We
obtained 278 CME events (14%) contemporary filament disappearances and CME ejections (from a total of 2018 filament disappearance
events and 15,874 CME events during 1996–2010). We found that the number of associated CME–filament disappearance events
increased with the increase of the solar activity and significantly decreased with quiet sun. The longer filament disappearances have activity
and ability to contemporary association with CMEs more than shorter filament disappearances. The filament disappearance powers
the associated CMEs. CMEs which are associated with filament disappearance are ejected with higher speeds, massive, more energetic,
and smaller angular width compared to non-associated CME events. In addition, the associated filament disappearance CMEs have two
types depending on their duration; short-lived (<9 h), and long-lived (>9 h).