中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
The Periodic and Temporal Behaviors of Solar X-Ray Flares in Solar Cycles 23 and 24

文献类型:期刊论文

作者Oloketuyi, Jacob1,2,3; Liu Y(刘煜)1,2; Zhao MY(赵明宇)1,2
刊名ASTROPHYSICAL JOURNAL
出版日期2019-03-20
卷号874期号:1页码:10
ISSN号0004-637X
关键词methods: data analysis Sun: activity Sun: flares sunspots
DOI10.3847/1538-4357/ab064c
产权排序第1完成单位
文献子类Article
英文摘要

The recent solar cycles 23 and 24 are thought to be unusually quiet with more prolonged periods. Both sunspot groups and solar soft X-ray (SXR) flares show a decline in numbers comparable to cycles 21 and 22. In order to understand the periodic variations and distributions of solar flares with the sunspot group numbers in these cycles, this study investigates the periodicities and distributions of the solar SXR flares, 36354 in total (B (13351) 36.7%, C (20699) 56.9%, M (2141) 5.9%, and X (163) 0.45%) between 1996 July and 2016 December. The continuous wavelet transforms and cross-correlation methods were used to carry out the study. First, we found that the B- class flare number is asynchronous and negatively correlated with the sunspot group numbers. The flare class exhibits deviation when sunspot group numbers rise or fall around 100. The other class flares are in phase, synchronous with the sunspot group numbers. The C-class flares show the highest level of correlation of 0.868 with sunspot group numbers. A different number of short and intermediate periodicities was also noticed among the flare classes. Notable 256-day periodicity is found for B flares, 7, 64, and 300 days for C, 32, 64, and 256 days for M flares, and 40, 32, and 25 days for X flares. The difference in periodic variations of the flare classes could be attributed to the magnetic flux system of sunspot groups producing them.

学科主题天文学 ; 太阳与太阳系 ; 太阳物理学
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词TERM PERIODICITIES ; WAVELET TRANSFORM ; MAGNETIC-FLUX ; SUNSPOT ; INDEX ; COHERENCE ; 154-DAY ; SUN
资助项目CAS-TWAS ; National Science Foundation of China[NSFC: 11533009] ; National Science Foundation of China[11603074] ; Key Laboratory of Geospace Environment, CAS, University of Science and Technology of China ; West Light Foundation, CAS
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000461631600007
资助机构CAS-TWAS ; National Science Foundation of China[NSFC: 11533009, 11603074] ; Key Laboratory of Geospace Environment, CAS, University of Science and Technology of China ; West Light Foundation, CAS
源URL[http://ir.ynao.ac.cn/handle/114a53/19503]  
专题云南天文台_选址与日冕观测组
通讯作者Liu Y(刘煜)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
2.Key Laboratory of Geospace Environment, Chinese Academy of Sciences, University of Science & Technology of China, Hefei 230026, People's Republic of China
3.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
推荐引用方式
GB/T 7714
Oloketuyi, Jacob,Liu Y,Zhao MY. The Periodic and Temporal Behaviors of Solar X-Ray Flares in Solar Cycles 23 and 24[J]. ASTROPHYSICAL JOURNAL,2019,874(1):10.
APA Oloketuyi, Jacob,Liu Y,&Zhao MY.(2019).The Periodic and Temporal Behaviors of Solar X-Ray Flares in Solar Cycles 23 and 24.ASTROPHYSICAL JOURNAL,874(1),10.
MLA Oloketuyi, Jacob,et al."The Periodic and Temporal Behaviors of Solar X-Ray Flares in Solar Cycles 23 and 24".ASTROPHYSICAL JOURNAL 874.1(2019):10.

入库方式: OAI收割

来源:云南天文台

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