Streamer Wave Events Observed in Solar Cycle 23 |
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| Authors: | S W Feng Y Chen B Li H Q Song X L Kong L D Xia X S Feng |
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| Institution: | 1.SIGMA Weather Group, State Key Laboratory for Space Weather, Center for Space Science and Applied Research,Chinese Academy of Sciences,Beijing,China;2.College of Earth Sciences,Graduate University of Chinese Academy of Sciences,Beijing,China;3.Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics,Shandong University at Weihai,Weihai,China |
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| Abstract: | In this paper we conduct a data survey searching for well-defined streamer wave events observed by the Large Angle and Spectrometric
Coronagraph (LASCO) on-board the Solar and Heliospheric Observatory (SOHO) throughout Solar Cycle 23. As a result, eight candidate events are found and presented here. We compare different
events and find that in most of them the driving CMEs’ ejecta are characterized by a high speed and a wide angular span, and
the CME–streamer interactions occur generally along the flank of the streamer structure at an altitude no higher than the
bottom of the field of view of LASCO C2. In addition, all front-side CMEs have accompanying flares. These common observational
features shed light on the excitation conditions of streamer wave events. |
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