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Quasi-periodic Pulsations of Gamma-Ray Emissions from a Solar Flare on 2017 September 6
Alternative TitleWOS:000519235300001
Li, D.; Kolotkov, D. Y.; Nakariakov, V. M.; Lu, L.; Ning, Z. J.
Source PublicationASTROPHYSICAL JOURNAL
2020
Volume888Issue:2Pages:53
DOI10.3847/1538-4357/ab5e86
ISSN0004-637X
Language英语
KeywordSolar X-ray emission Solar gamma-ray emission Solar oscillations Solar flares Solar radio emission STATISTICAL PROPERTIES MAGNETIC RECONNECTION RADIO PULSATIONS OSCILLATIONS ACCELERATION MODEL SIGNATURE WIND
AbstractWe investigate quasi-periodic pulsations (QPPs) of high-energy nonthermal emissions from an X9.3 flare (SOL2017-Sep-06T11:53), the most powerful flare since the beginning of solar cycle 24. The QPPs are identified as a series of regular and repeating peaks in the light curves in the gamma- and hard X-ray (HXR) channels recorded by the Konus-Wind, as well as the radio and microwave fluxes measured by the CALLISTO radio spectrograph during the impulsive phase. The periods are determined from the global wavelet and Fourier power spectra as 24-30 s in the HXR and microwave channels, which are associated with nonthermal electrons, and similar to 20 s in the gamma-ray band related to nonthermal ions. Both nonthermal electrons and ions may be accelerated by repetitive magnetic reconnection during the impulsive phase. However, we could not rule out other mechanisms, such as magnetohydrodynamic oscillation in a sausage mode. The QPP detected in this study is useful for understanding the particle acceleration and dynamic process in solar flares and also bridging the gap between stellar and solar flares because the energy realm of the X9.3 solar flare is almost comparable to a typical stellar flare.
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7609
Collection中国科学院国家空间科学中心
Affiliation1.[Li, D.
2.Lu, L.
3.Ning, Z. J.] Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210033, Peoples R China
4.[Li, D.] Chinese Acad Sci, State Key Lab Space Weather, Beijing 100190, Peoples R China
5.[Kolotkov, D. Y.
6.Nakariakov, V. M.] Univ Warwick, Ctr Fus Space & Astrophys, Dept Phys, Coventry CV4 7AL, W Midlands, England
7.[Kolotkov, D. Y.] Inst Solar Terr Phys, Lermontov St,126a, Irkutsk 66033, Russia
8.[Nakariakov, V. M.] Russian Acad Sci, Special Astrophys Observ, St Petersburg Branch, St Petersburg 196140, Russia
Recommended Citation
GB/T 7714
Li, D.,Kolotkov, D. Y.,Nakariakov, V. M.,et al. Quasi-periodic Pulsations of Gamma-Ray Emissions from a Solar Flare on 2017 September 6[J]. ASTROPHYSICAL JOURNAL,2020,888(2):53.
APA Li, D.,Kolotkov, D. Y.,Nakariakov, V. M.,Lu, L.,&Ning, Z. J..(2020).Quasi-periodic Pulsations of Gamma-Ray Emissions from a Solar Flare on 2017 September 6.ASTROPHYSICAL JOURNAL,888(2),53.
MLA Li, D.,et al."Quasi-periodic Pulsations of Gamma-Ray Emissions from a Solar Flare on 2017 September 6".ASTROPHYSICAL JOURNAL 888.2(2020):53.
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