Rapid Rotation Of Erupting Prominence And The Associated Coronal Mass Ejection On 13 May 2013

Prominences are important structural objects formed during the evolution and activity of the solar magnetic field.They are suspended in the solar atmosphere above the photosphere and appear as plasma clusters with lower temperatures and higher density than the surrounding atmosphere.Their temperature is about 1%of the corona and their density is about 100 times that of the corona in magnitude.After a prominence becomes unstable and erupts,it will generate a coronal mass ejection(CME),which will cause high-energy particles and plasma to change the magnetic field environment around the Earth,causing catastrophic weather to the space environment near Earth,affecting the Earth’s communication system,power system,aerospace,and normal life:Therefore,in order to reduce the disastrous impact of such solar eruptions on Earth through space weather warnings,scientific research on the instability of prominence is particularly important and essential.The first chapter of this thesis focuses on the scientific background of prominence and coronal mass ejections,including the basic configuration of prominence,magnetic field structure,types of outbursts,triggering mechanisms of outbursts,classical patterns of coronal mass ejections,and a brief introduction to the observational instruments involved in this thesis.In the second chapter of this paper,we report a multiwavelength analysis of a prominence eruption on May 13,2013,and the accompanying coronal mass ejection.This event is in the field of view of the AIA payload on the SDO satellite,located on the backside of the western solar disk.The work employs data from multiple satellites,with multiple viewpoints and multi-wavelengths,to observe the prominence and the accompanying CME.The prominence is supported by a highly entangled magnetic flux rope and exhibits a pronounced counterclockwise rotation during the outburst.We used a time-space diagram to analyze the state of motion and found that its rotation lasted for a total of 47 minutes.The average period of the rotation is～806 s,the average angular velocity is～0.46 rad/min,and the average linear velocity is～355 km/s.The total number of windings reaches～7π and exceeds the critical value of the ideal kink instability.At about 17:46 UT,torsional entanglement was observed when the prominence lifted to～405 Mm in altitude.A pair of conjugate flare ribbons and post-flare loops are observed by STA/EUVI.The observation shows that kink instability is the triggering mechanism for the onset of the eruption.The dynamical evolution of the CME is divided into two phases(～330 km/s)for the slow-rising phase and～1005 km/s for the fast-rising phase.The latitude of the CME source region decreases from 18° to 13°,indicating a drift toward the equator during the CME propagation.The above two works mainly explore the triggering mechanism of the prominence eruption by analyzing the time-distance maps in multiple wavelengths and perspectives and reconstructing and recovering the three-dimensional morphology of the CME.The third chapter of this paper summarizes the two works in the second chapter and gives a future outlook on the shortcomings.