| 其他摘要 | Our Sun, the closest star from the Earth, which is powered mainly by the nuclear fusion inside its core. It is a powerful star, whose mass accounts for about 99.86% of the total mass of the Solar System. There are many kinds of erupting activities spreading all over the Sun, including large size events: flares, solar jets, solar wind, filament eruptions, coronal mass ejection (CME), and Extreme Ultra-violet (EUV) waves; and small ones: coronal bright eruptions, mini-filament eruptions. The Earth is mainly powered by the Sun, with no doubt that our living planet is closely concerned with the Sun. Thus carrying out researches on the formation and mechanism of the eruption of the Sun, and forecasting them precisely is of importance. And this will in return prompt our understanding regarding other stars. This paper mainly focuses on the high resolution observations of two solar eruptions; one is large eruption and the other small eruption. Our analyses, based on the high resolution data, try to demonstrate their formations, evolution and beyond mechanisms. For the two-sided jet (third chapter), we used the combined observations of one ground-based Hα solar telescope and two space multi-wavelength telescopes, to demonstrate the formation of this two-sided jet driven by the reconnection between two filaments, involving its pre-eruption stage, the trigger of reconnetcion and the result of reconnection. We also use stereoscopic observations to reconstruct the two filaments in 3 dimensions. In the line-wing observations of Hα, the current sheet’s formation and evolution is captured, which confirms the trigger of this event. Besides this, our study also shed light on the partial eruption of filaments. For the sympathetic jets (fourth chapter), we report the sympathy between two solar jets, combining the data of X-ray channels with EUV channels. These two events occurring at different sites but associated with each other physically are called sympathies. In this research, we found two successive jets, which are emanated from two different sites. During the first eruption, the first jet was associated closely with the magnetic emergence and cancellation, which resulted from the reconnection between the magnetic loop and its nearby ambient field. And our observations further evidence that the first jet then reconnected with its nearby coronal bright point, which triggered the second jet. A strong kink structure was confirmed within the base of second jet, which eventually erupted and formed a blowout jet being an appearance of a wide spire and dramatically brightening within its base. This research concludes: solar jets can be triggered by external eruptions or disturbances. Lots of solar activities still remain unsolved. To find the answers out, we may needhegher resolution solar telescopes. |
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