Observation Of A Solar Filament And Coronal Extreme Ultraviolet Waves

Solar eruptions can release a large amount of plasma and magnetic field and thus lead to a significant disturbance for space weather,therefore affecting space weather.Violent solar eruptions can affect the safety of space station staff and daily satellite communication on Earth.Therefore,the observation of solar eruptions is beneficial for us to grasp the essence of solar eruptions and make better predictions of changes in space weather.This article is mainly divided into two parts.Firstly,it studies the filaments that cause solar eruptions.The opposite physical essence between filament deformation and filament eruptions was analyzed through a special life cycle of a small filament from formation to deformation.The second part is to study the extreme ultraviolet waves generated by solar eruptions.The driving mechanism of wave is explored more deeply by associating the magnetic field with the birth place of the wave.In the observation of solar filaments,the formation process of small filaments in AR12760 was studied using high-resolution observation from SDO and SMART.The elongated small filament is formed by multiple head tail magnetic reconnection between several filament threads.During reconnection,there existed significant magnetic evolution in the source region(magnetic emergence,magnetic convergence,and magnetic cancellation),and associated brightenings in the upper atmosphere.It likely suggests that the formation of small filament is closely related to the magnetic activity in the photosphere.In the observation of coronal extreme ultraviolet waves,three coronal extreme ultraviolet waves driven by solar jets were selected.The three waves were not associated with CMEs.It is to explore the specific interaction process between jet and overlying loops that remain close during the eruption and then provide insight for the driving mechanism of jet-driven waves.Combining magnetic field in the photosphere and PFSS method,the distribution of the magnetic field intensity of the overlying loops is quantified.Comparing the birth place of waves and the weakest part of the overlying loops,it is likely the jet prefer to interacted with the weakest part of the overlying loops.Therefore the wave was generated ahead of this part.