Direct EIT Observations of a Prominence-Associated CME Initiation With the Kink and Drainage Instabilities

HR: 11:10h
AN: SH12A-04 [Abstracts]
TI: Direct EIT Observations of a Prominence-Associated CME Initiation With the Kink and Drainage Instabilities
AU: * Zhou, G
SH12A-04 AF: National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012 China
AU: Wang, J
EM: wjx@ourstar.bao.ac.cn
AF: National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012 China
AU: Chen, P
EM: chenpf@nju.edu.cn
AF: Department of Astronomy, Nanjing University, Nanjing, 210039 China
AU: Zhang, J
EM: zjun@ourstar.bao.ac.cn
AF: National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012 China
AU: Pu, Z
EM: zypu@pku.edu.cn
AF: School of geophysics and space, Peking University, Beijing, 100871 China
AB: We found a clear case to show the onset phase of two successive CMEs associated with an eruptive prominence on Dec. 28 2002. The prominence(~137000 km in length) presented twist for three circles before its upward motion; then converted its twist to writhing helicity with kink-instability; and last disrupted because of drainage instability. Following the eruption, two successive associated CMEs first appeared at 13:54 UT and 16:30 UT in LASCO C2 images, respectively, and the attendant phenomenon a cusp shape structure and post-flare loop were observed. This evidence partially supports the flux rope model and flux rope instability model, but unlike previous studies, the prominence eruption itself has all the observable characteristics of the kink and drainage instability from the direct EIT observations. And magnetic reconnection was just an attendant phenomena after the prominence disruption that might only attribute to the CMEs' acceleration out of 8 R_•. The associated CMEs are suggested to come from the energized overlaying arcades driven by the eruptive prominence with kink and drainage instability.
DE: 7513 Coronal mass ejections (2101)
DE: 7519 Flares
DE: 7526 Magnetic reconnection (2723, 7835)
DE: 7531 Prominence eruptions
SC: SPA-Solar and Heliospheric Physics [SH]
MN: Fall Meeting 2005