NSSC OpenIR
Quasi-periodic Pulsation Detected in Ly alpha Emission During Solar Flares
Alternative TitleWOS:000525507000001
Li, Dong1,2; Lu, Lei; Ning, Zongjun; Feng, Li; Gan, Weiqun; Li, Hui
Source PublicationASTROPHYSICAL JOURNAL
2020
Volume893Issue:1Pages:7
DOI10.3847/1538-4357/ab7cd1
ISSN0004-637X
Language英语
KeywordSolar flares Solar oscillations Solar chromosphere Solar ultraviolet emission Solar x-ray emission CORONAL LOOP OSCILLATIONS X-RAY-EMISSION MAGNETOHYDRODYNAMIC OSCILLATIONS RADIO PULSATIONS LYMAN-ALPHA MICROWAVE ACCELERATION EVENTS
AbstractWe investigated the quasi-periodic pulsation (QPP) in Ly alpha, X-ray, and extreme-ultraviolet (EUV) emissions during two solar flares, i.e., an X-class (SOL2012-01-27T) and a C-class (SOL2016-02-08T). The full-disk Ly alpha and X-ray flux during these solar flares were recorded by the EUV Sensor and X-Ray Sensor on board the Geostationary Operational Environmental Satellite. The flare regions were located from the EUV images measured by the Atmospheric Imaging Assembly. The QPP could be identified as a series of regular and periodic peaks in the light curves, and its quasi-periodicity was determined from the global wavelet and Fourier power spectra. A quasi-periodicity at about 3 minutes is detected during the impulsive phase of the X-class flare, which could be explained as the acoustic wave in the chromosphere. Interestingly, a quasi-periodicity at roughly 1 minute is discovered during the entire evolutionary phases of solar flares, including the precursor, impulsive, and gradual phases. This is the first report of 1 minute QPP in the Ly alpha emission during solar flares, in particular during the flare precursor. It may be interpreted as a self-oscillatory regime of the magnetic reconnection, such as magnetic dripping.
Indexed BySCI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7608
Collection中国科学院国家空间科学中心
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210033, Peoples R China
2.Chinese Acad Sci, State Key Lab Space Weather, Beijing 100190, Peoples R China
3.Natl Astron Observ, CAS Key Lab Solar Act, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Li, Dong,Lu, Lei,Ning, Zongjun,et al. Quasi-periodic Pulsation Detected in Ly alpha Emission During Solar Flares[J]. ASTROPHYSICAL JOURNAL,2020,893(1):7.
APA Li, Dong,Lu, Lei,Ning, Zongjun,Feng, Li,Gan, Weiqun,&Li, Hui.(2020).Quasi-periodic Pulsation Detected in Ly alpha Emission During Solar Flares.ASTROPHYSICAL JOURNAL,893(1),7.
MLA Li, Dong,et al."Quasi-periodic Pulsation Detected in Ly alpha Emission During Solar Flares".ASTROPHYSICAL JOURNAL 893.1(2020):7.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Li, Dong]'s Articles
[Lu, Lei]'s Articles
[Ning, Zongjun]'s Articles
Baidu academic
Similar articles in Baidu academic
[Li, Dong]'s Articles
[Lu, Lei]'s Articles
[Ning, Zongjun]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Li, Dong]'s Articles
[Lu, Lei]'s Articles
[Ning, Zongjun]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.