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| Quasi-periodic Pulsation Detected in Ly alpha Emission During Solar Flares | |
| Alternative Title | WOS:000525507000001 |
| Li, Dong1,2; Lu, Lei; Ning, Zongjun; Feng, Li; Gan, Weiqun; Li, Hui | |
| Source Publication | ASTROPHYSICAL JOURNAL
 |
| 2020 | |
| Volume | 893Issue:1Pages:7 |
| DOI | 10.3847/1538-4357/ab7cd1 |
| ISSN | 0004-637X |
| Language | 英语 |
| Keyword | Solar 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 |
| Abstract | 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. |
| Indexed By | SCI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.nssc.ac.cn/handle/122/7608 |
| Collection | 中国科学院国家空间科学中心 |
| Affiliation | 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 |
| 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. |
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