High-resolution observations of prominence plume formation with the new vacuum solar telescope  

作　　者：Jian-Chao Xue Jean-Claude Vial Yang Su Hui Li Zhi Xu Ying-Na Su Tuan-Hui Zhou Zhen-Tong Li 薛建朝;Jean-Claude Vial;Yang Su;Hui Li;Zhi Xu;Ying-Na Su;Tuan-Hui Zhou;Zhen-Tong Li(Key Laboratory of Dark Matter and Space Astronomy,Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023,China;School of Astronomy and Space Science,University of Science and Technology of China,Hefei 230026,China;Institut d'strophysique Spatiale,CNRS/UniversitéParis-Sud,UniversitéParis-Saclay,Bâtiment 121,91405 Orsay Cedex,France;Yunnan Observatories,Chinese Academy of Sciences,Kunming 650216,China)

机构地区：[1]Key Laboratory of Dark Matter and Space Astronomy,Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023,China [2]School of Astronomy and Space Science,University of Science and Technology of China,Hefei 230026,China [3]Institut d'strophysique Spatiale,CNRS/UniversitéParis-Sud,UniversitéParis-Saclay,Bâtiment 121,91405 Orsay Cedex,France [4]Yunnan Observatories,Chinese Academy of Sciences,Kunming 650216,China

出　　处：《Research in Astronomy and Astrophysics》2021年第9期91-100,共10页天文和天体物理学研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(NSFC,Grant Nos.11427803,U1731241,U1631242 and 11820101002);by CAS Strategic Pioneer Program on Space Science(Grant Nos.XDA15052200,XDA15320103,XDA15320300 and XDA15320301);the Jiangsu Double Innovation Plan;NSFC(Grant No.11873091);Yunnan Province Basic Research Plan(No.2019FA001)。

摘　　要：Prominence plumes are evacuated upflows that emerge from bubbles below prominences,whose formation mechanism is still unclear.Here we present a detailed study of plumes in a quiescent prominence using the high-resolution Hαfiltergrams at the line center as well as line wing at±0.4 A from the New Vacuum Solar Telescope.Enhancements of brightening,blue shifts,and turbulence at the fronts of plumes are found during their formation.Some large plumes split at their heads and finger-shaped structures are formed between them.Blue-shifted flows along the bubble-prominence interface are found before and during the plume formation.Our observations are consistent with the hypothesis that prominence plumes are related to coupled Kelvin-Helmholtz and Rayleigh-Taylor(KH/RT)instabilities.Plume splittings and fingers are evidence of RT instability,and the flows may increase the growth rate of KH/RT instabilities.However,the significant turbulence at plume fronts may suggest that the RT instability is triggered by the plumes penetrating into the prominence.In this scenario,extra mechanisms are necessary to drive the plumes.

关 键 词：INSTABILITIES methods:data analysis Sun:filaments prominences 

分 类 号：P111[天文地球—天文学]