MHD Seismology of a loop-like filament tube by observed kink waves  

作　　者：Vaibhav Pant Abhishek K Srivastava Dipankar Banerjee Marcel Goossens Peng-Fei Chen Navin Chandra Joshi Yu-Hao Zhou 

机构地区：[1]Indian Institute of Astrophysics [2]Department of Physics,Indian Institute of Technology(BHU) [3]Center of Excellence in Space Sciences [4]Centre for Mathematical Plasma Astrophysics,Department of Mathematics [5]School of Astronomy and Space Science,Nanjing University [6]Key Lab of Modern Astronomy and Astrophysics,Nanjing University [7]School of Space Research,Kyung Hee University

出　　处：《Research in Astronomy and Astrophysics》2015年第10期1713-1724,共12页天文和天体物理学研究（英文版）

基　　金：support from KU Leuven via GOA/2009-009;support from the Interuniversity Attraction Poles Programme initiated by the Belgian Science Policy Office(IAP P7/08 Charm);supported by the Chinese foundations2011CB811402;the National Natural Science Foundation of China(Grant Nos.11025314,10933003 and 10673004)

摘　　要：We report and analyze observational evidence of global kink oscillations in a solar filament as observed in Ha by instruments administered by National Solar Observatory （NSO）/Global Oscillation Network Group （GONG）. An M1.1-class flare in active region （AR） 11692 occurred on 2013 March 15 and induced a global kink mode in the filament lying towards the southwest of AR 11692. We find periods of about 61-67 minutes and damping times of 92-117 minutes at positions of three ver- tical slices chosen in and around the filament apex. We find that the waves are damped. From the observed period of the global kink mode and damping timescale using the theory of resonant absorption, we perform prominence seismology. We estimate a lower cut-off value for the inhomogeneity length scale to be around 0.34-0.44 times the radius of the filament cross-section.We report and analyze observational evidence of global kink oscillations in a solar filament as observed in Ha by instruments administered by National Solar Observatory （NSO）/Global Oscillation Network Group （GONG）. An M1.1-class flare in active region （AR） 11692 occurred on 2013 March 15 and induced a global kink mode in the filament lying towards the southwest of AR 11692. We find periods of about 61-67 minutes and damping times of 92-117 minutes at positions of three ver- tical slices chosen in and around the filament apex. We find that the waves are damped. From the observed period of the global kink mode and damping timescale using the theory of resonant absorption, we perform prominence seismology. We estimate a lower cut-off value for the inhomogeneity length scale to be around 0.34-0.44 times the radius of the filament cross-section.

关 键 词：Sun： oscillations -- Sun： magnetic fields -- Sun： filament 

分 类 号：P182[天文地球—天文学]