Quasi-periodic Pulsation Detected in Ly alpha Emission During Solar Flares
文献类型：期刊论文
| 作者 | Li, Dong1,2,3; Lu, Lei1; Ning, Zongjun1; Feng, Li1; Gan, Weiqun1; Li, Hui1 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2020-04-10 |
| 卷号 | 893期号:1页码:11 |
| ISSN号 | 0004-637X |
| 关键词 | Solar flares Solar oscillations Solar chromosphere Solar ultraviolet emission Solar x-ray emission |
| DOI | 10.3847/1538-4357/ab7cd1 |
| 英文摘要 | We 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. |
| WOS关键词 | CORONAL LOOP OSCILLATIONS ; X-RAY-EMISSION ; MAGNETOHYDRODYNAMIC OSCILLATIONS ; RADIO PULSATIONS ; LYMAN-ALPHA ; MICROWAVE ; ACCELERATION ; EVENTS |
| 资助项目 | NSFC[11973092] ; NSFC[11921003] ; NSFC[11973012] ; NSFC[11873095] ; NSFC[11790302] ; NSFC[11790300] ; NSFC[11729301] ; NSFC[11773061] ; NSFC[U1731241] ; NSFC[U1931138] ; Youth Fund of Jiangsu[BK20171108] ; Youth Fund of Jiangsu[KLSA202003] ; CAS Strategic Pioneer Program on Space Science[XDA15052200] ; CAS Strategic Pioneer Program on Space Science[XDA15320103] ; CAS Strategic Pioneer Program on Space Science[XDA15320301] ; Specialized Research Fund for State Key Laboratories ; mobility grant of Sino-German Science Center[M-0068] ; National key research and development program[2018YFA0404202] ; National key research and development program[2010DP173032] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000525507000001 |
| 资助机构 | NSFC ; NSFC ; Youth Fund of Jiangsu ; Youth Fund of Jiangsu ; CAS Strategic Pioneer Program on Space Science ; CAS Strategic Pioneer Program on Space Science ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; mobility grant of Sino-German Science Center ; mobility grant of Sino-German Science Center ; National key research and development program ; National key research and development program ; NSFC ; NSFC ; Youth Fund of Jiangsu ; Youth Fund of Jiangsu ; CAS Strategic Pioneer Program on Space Science ; CAS Strategic Pioneer Program on Space Science ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; mobility grant of Sino-German Science Center ; mobility grant of Sino-German Science Center ; National key research and development program ; National key research and development program ; NSFC ; NSFC ; Youth Fund of Jiangsu ; Youth Fund of Jiangsu ; CAS Strategic Pioneer Program on Space Science ; CAS Strategic Pioneer Program on Space Science ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; mobility grant of Sino-German Science Center ; mobility grant of Sino-German Science Center ; National key research and development program ; National key research and development program ; NSFC ; NSFC ; Youth Fund of Jiangsu ; Youth Fund of Jiangsu ; CAS Strategic Pioneer Program on Space Science ; CAS Strategic Pioneer Program on Space Science ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; mobility grant of Sino-German Science Center ; mobility grant of Sino-German Science Center ; National key research and development program ; National key research and development program |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/55882]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Li, Dong |
| 作者单位 | 1.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 |
| 推荐引用方式 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):11. |
| 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),11. |
| MLA | Li, Dong,et al."Quasi-periodic Pulsation Detected in Ly alpha Emission During Solar Flares".ASTROPHYSICAL JOURNAL 893.1(2020):11. |
入库方式： OAI收割
来源：国家天文台
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