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Catalog and Statistical Examinations of Lyα Solar Flares from GOES/EUVS-E Measurements
Lu,Lei1,2; Feng,Li1; Li,Dong1,2; Ying,Beili1; Li,Hui1; Gan,Weiqun1; Li,Youping1; Zhou,Jiujiu3
2021-03-01
Source PublicationThe Astrophysical Journal Supplement Series
ISSN0067-0049
Volume253Issue:1
AbstractAbstract The Lyman-alpha (Lyα) line of neutral hydrogen at 121.6 nm is by far the brightest emission line in the vacuum ultraviolet spectral range of the Sun. The emission at this line could be a major energy input to the upper layers of the Earth’s atmosphere, strongly impacting the geospace environment. The Geostationary Operational Environmental Satellite (GOES) series, starting with GOES-13, began to carry a multichannel Extreme UltraViolet Sensor (EUVS) with one channel (E-channel) targeting the Lyα line. In the present work, we produce a Lyα flare catalog from the GOES-15/EUVS-E data between 2010 April 8 and 2016 June 6 with an automatic flare detection algorithm. This algorithm is designed to search events at various scales and find their real start and end times. Based on the obtained flare list, statistics on the temporal behavior such as the duration, rise, and decay times, and the event asymmetries of Lyα flares is presented. On average (defined by the median of the distributions), the duration, rise and decay times of the flares were estimated to be 20.8 minutes, 5.6 minutes, and 14.2 minutes, respectively. We also discuss the frequency distributions of the peak flux and the fluence of Lyα flares, both of which reveal power-law behaviors with power-law indices of 2.71 ± 0.06 and 2.42 ± 0.06, respectively, implying that more flares are accumulated at small scales and these small-scale events play an important role in explaining the violent solar energy release.
KeywordAstrostatistics distributions Solar flares Solar ultraviolet emission Algorithms
DOI10.3847/1538-4365/abd79b
Language英语
WOS IDIOP:0067-0049-253-1-abd79b
PublisherThe American Astronomical Society
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/60095
Collection中国科学院国家天文台
Corresponding AuthorLu,Lei
Affiliation1.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210008 Nanjing, People's Republic of China leilu@pmo.ac.cn, lfeng@pmo.ac.cn
2.CAS Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China
3.Department of Mathematics, Middlebury College, VT 05753, USA
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Lu,Lei,Feng,Li,Li,Dong,et al. Catalog and Statistical Examinations of Lyα Solar Flares from GOES/EUVS-E Measurements[J]. The Astrophysical Journal Supplement Series,2021,253(1).
APA Lu,Lei.,Feng,Li.,Li,Dong.,Ying,Beili.,Li,Hui.,...&Zhou,Jiujiu.(2021).Catalog and Statistical Examinations of Lyα Solar Flares from GOES/EUVS-E Measurements.The Astrophysical Journal Supplement Series,253(1).
MLA Lu,Lei,et al."Catalog and Statistical Examinations of Lyα Solar Flares from GOES/EUVS-E Measurements".The Astrophysical Journal Supplement Series 253.1(2021).
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