Paired quasi-periodic pulsations of hard X-ray emission in a solar flare

被引：0

作者：

Hai-Sheng Zhao ^{[1
]}

Dong Li ^{[2
]}

Shao-Lin Xiong ^{[1
]}

Yan-Qiu Zhang ^{[1
,3
]}

Yang Su ^{[2
]}

Wei Chen ^{[2
]}

Yi Zhao ^{[1
,4
]}

Xiao-Bo Li ^{[1
]}

Jia-Cong Liu ^{[1
]}

Wen-Xi Peng ^{[1
]}

Rui Qiao ^{[1
]}

Xin-Qiao Li ^{[1
]}

Xiang-Yang Wen ^{[1
]}

Li-Ming Song ^{[1
]}

Shi-Jie Zheng ^{[1
]}

Xin-Ying Song ^{[1
]}

Xiao-Yun Zhao ^{[1
]}

Yue Huang ^{[1
]}

Shuang-Nan Zhang ^{[1
]}

Shuo Xiao ^{[1
,3
]}

Ce Cai ^{[1
,3
]}

Zheng-Hua An ^{[1
]}

Can Chen ^{[1
,3
]}

Gang Chen ^{[1
]}

Yan-Qi Du ^{[1
,5
]}

Min Gao ^{[1
]}

Ke Gong ^{[1
]}

Dong-Ya Guo ^{[1
]}

Zhi-Wei Guo ^{[1
,6
]}

Jian-Jian He ^{[1
]}

Bin Li ^{[1
]}

Chao Li ^{[1
,7
]}

Chao-Yang Li ^{[1
,8
]}

Gang Li ^{[1
]}

Jian-Hui Li ^{[1
,3
]}

Lu Li ^{[1
]}

Qing-Xin Li ^{[1
,7
]}

Yan-Guo Li ^{[1
]}

Jing Liang ^{[1
,5
]}

Xiao-Hua Liang ^{[1
]}

Jin-Yuan Liao ^{[1
]}

Xiao-Jing Liu ^{[1
]}

Ya-Qing Liu ^{[1
]}

Qi Luo ^{[1
,3
]}

Xiang Ma ^{[1
]}

Bin Meng ^{[1
]}

Ge Ou ^{[1
]}

Dong-Li Shi ^{[1
,5
]}

Jing-Yan Shi ^{[1
]}

Gong-Xing Sun ^{[1
]}

机构：

[1] School of Physics, Changchun University of Science and Technology

[2] College of Physics and Engineering, Qufu Normal University

[3] Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences

[4] Purple Mountain Observatory, Chinese Academy of Sciences

[5] University of Chinese Academy of Sciences

[6] Department of Astronomy, Beijing Normal University

[7] School of Computing and Artifcial Intelligence, Southwest Jiaotong University

[8] College of Physics Sciences & Technology, Hebei University

[9] Key Laboratory of Stellar and Interstellar Physics and Department of Physics, Xiangtan University

[10] Physics and Space Science College, China West Normal University

[11] Institute of Astrophysics, Central China Normal University

来源：

Science China(Physics,Mechanics & Astronomy) | 2023年 / Mechanics & Astronomy)2023卷 / 05期

基金：

中国国家自然科学基金;

关键词：

D O I：

暂无

中图分类号：

P182 [太阳物理学];

学科分类号：

070401 ;

摘要：

We investigate high time resolution data obtained by the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM) during the fare event on 2022 April 21 at 01:52 UT. Several subpeaks with durations of 4-6 s have been detected in the hard X-ray precursor phase, and the key feature is that they appear in pairs and seem like double-peak structures. These subpeaks are rarely observed in hard X-ray band and confrmed by the microwave obtained by Nobeyama Radio Polarimeters(No RP) and Radio Solar Telescope Network(RSTN). While an exponential function can describe the continuum component of the time profle from the precursor to part of the impulsive phase. The periods of quasi-periodic pulsations(QPPs)are detected to be about 7.3 and 12.8 s for the precursor and impulsive phase, respectively, with at least 95% confdence level.The paired QPPs are assumed to be double-peak QPPs and then the scenario of current loop coalescence model is found to be in good agreement with our observation. The precursor phase can be interpreted as the oscillating coalescence of two islands, while the impulsive phase can be interpreted as more islands to coalesce one by one to form larger islands.

引用

页码：199 / 210

页数：12

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