http://arxiv.org/abs/1703.10022
Based on high-resolution {\sl Big Bear Solar Observatory} ({\sl BBSO}), {\sl Solar Dynamics Observatory} ({\sl SDO}) and {\sl Solar Terrestrial Relations Observatory} ({\sl STEREO}) data, a small H$\alpha$ filament eruption is observed during the blowout jet phase whose length is estimated to be larger than 400 Mm with an average velocity of about \speed{270} in the active region NOAA 11166 on March 09, 2011. An evident magnetic flux cancellation is observed on the photosphere during the double-CME blowout jet. We also find that the blowout jet had an unwinding motion during the eruption phase. Interestingly, a short time shock wave appeared at the beginning of the eruption, the shock wave was very difficult to be observed in jet eruption events. From {\sl SDO} 193 \AA\ , can easily to distinguish the shock wave. From {\sl SDO} viewpoint, the bubble-like CME was formed by the front part of the jet, and the jet-like CME was formed by rectilinear part of the jet. But from {\sl STEREO} COR1 A and B viewpoints, the result shows an overlapping behavior of the jet-like and the bubble-like CMEs as highlighted by {\sl STEREO} observations. From the analysis of the high-cadence COR1 data, we propose that the observed overlapping of the two CMEs was due to the special magnetic field distribution on the photosphere that we depict in a simple sketch model. The studied event, blowout jet with two simultaneous CMEs, with its atypical structures indicates again that a variety of solar activities with different spatial scales might simultaneously take place and integrate into one solar eruption phenomenon.
Y. Miao, Y. Liu, Y. Shen, et. al.
Thu, 30 Mar 17
35/69
Comments: N/A