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Quasi-periodic pulsations with multiple periods in hard X-ray emission
Li, D.1,2; Zhang, Q. M.1
2017-10-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume471Issue:1Pages:L6-L10
Corresponding AuthorLi, D.(lidong@pmo.ac.cn)
AbstractWe explore quasi-periodic pulsations with multiple periods in hard X-ray (HXR) emission from the Fermi Gamma-ray Burst Monitor during the impulsive phase of a solar flare (SOL2014-09-10). The completely new observational result is that the shorter periods appear at lower energies of the X-ray photons at the beginning and the longer periods appear at higher energies at the end, with some intersection of the periods at medium energies. We also find shorter and then longer periods during the same phase of this flare. Using the wavelet power spectrum and fast Fourier transform spectrum, we analyse the normalized rapidly varying signal divided by its slowly varying signal, which is the smoothed original HXR flux. The periods of 27 and 37 s are derived at lower-energy channels between 17: 25 and 17: 29 UT (i.e. 12.0-27.3 and 27.3-50.9 keV). Then, the periods of 27, 46 and 60 s are observed at the medium-energy channel from 17: 26 to 17: 33 UT, such as 50.9-102.3 keV. Also, the period of 80 s is detected at the higher-energy channel from 17: 28 to 17: 33 UT, such as 102.3-296.4 keV.
KeywordSun: flares Sun: oscillations Sun: X-rays, gamma-rays
DOI10.1093/mnrasl/slx091
WOS KeywordCORONAL LOOP OSCILLATIONS ; SOLAR-FLARE LOOPS ; TIME-SERIES ; MICROWAVE ; BURSTS ; MICROFLARES ; EVENT ; SUMER
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000411640400002
PublisherOXFORD UNIV PRESS
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22725
Collection中国科学院紫金山天文台
Corresponding AuthorLi, D.
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Sci, Nanjing 210008, Jiangsu, Peoples R China
2.Nanjing Univ, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing 210023, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Li, D.,Zhang, Q. M.. Quasi-periodic pulsations with multiple periods in hard X-ray emission[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,471(1):L6-L10.
APA Li, D.,&Zhang, Q. M..(2017).Quasi-periodic pulsations with multiple periods in hard X-ray emission.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,471(1),L6-L10.
MLA Li, D.,et al."Quasi-periodic pulsations with multiple periods in hard X-ray emission".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 471.1(2017):L6-L10.
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