首页|Consecutive narrow and broad quasi-periodic fast-propagating wave trains associated with a flare

Consecutive narrow and broad quasi-periodic fast-propagating wave trains associated with a flare

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The excitation mechanism of coronal quasi-period fast-propagating(QFP)wave trains remains unresolved.Using Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory observations,we study a narrow and a broad QFP wave trains excited one after another during the successive eruptions of filaments hosted within a fan-spine magnetic system on October 20,2013.The consecutive occurrence of these two types of QFP wave trains in the same event provides an excellent opportunity to explore their excitation mechanisms and compare their physical parameters.Our observational results reveal that narrow and broad QFP wave trains exhibit distinct speeds,periods,energy fluxes,and relative intensity amplitudes,although originating from the same active region and being associated with the same GOES C2.9 flare.Using wavelet analysis,we find that the narrow QFP wave train shares a similar period with the flare itself,suggesting its possible excitation through the pulsed energy release in the magnetic reconnection process that generated the accompanying flare.On the other hand,the broad QFP wave train appears to be associated with the energy pulses released by the successive expansion and unwinding of filament threads.Additionally,it is plausible that the broad QFP wave train was also excited by the sequential stretching of closed magnetic field lines driven by the erupting filament.These findings shed light on the different excitation mechanisms and origins of the QFP wave trains.

MHD wavesAlfvén wavesflares

Xinping Zhou、Yuandeng Shen、Chengrui Zhou、Zehao Tang、Ahmed Ahmed Ibrahim

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College of Physics and Electronic Engineering,Sichuan Normal University,Chengdu 610068,China

State Key Laboratory of Space Weather,Chinese Academy of Sciences,Beijing 100190,China

Yunnan Observatories,Chinese Academy of Sciences,Kunming 650216,China

Department of Physics and Astronomy,College of Science,King Saud University,P.O.Box 2455,Riyadh 11451,Saudi Arabia

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National Natural Science Foundation of ChinaNatural Science Foundation for Youths of Sichuan ProvinceSpecialized Research Fund for State Key LaboratoriesNational Natural Science Foundation of ChinaYunnan Science Foundation for Distinguished Young ScholarsResearchers Supporting Project,King Saud University,Riyadh,Saudi ArabiaResearchers Supporting Project,King Saud University,Riyadh,Saudi ArabiaISSI-BJ for supporting the international team

123030622023NSFSC135112173083202101AV070004RSPD2023R993RSPD2024R993

2024

10.1007/s11433-023-2309-5

中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子：0.91
ISSN：1674-7348
年,卷(期)：2024.67(5)