High-resolution Observational Features of Type I Solar Radio Bursts
文献类型：期刊论文
| 作者 | Yang, Yuzhi1,2; Ning, Zongjun1,2; Song, Yuxiang1,2; Han, Yijie1,2; Tang, Xiaoyu1,2; Gao, Mingbao1,2; Liu H(刘辉)3 ; Yan, Jingye4,5; Wang, Bing6; Chang, Shuwang6
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2025-06-01 |
| 卷号 | 985期号:2 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/add143 |
| 产权排序 | 第3完成单位 |
| 文献子类 | Article |
| 英文摘要 | In this paper, we statistically studied the characteristic features of solar radio Type I bursts observed by Chashan broadband solar radio spectrometer at meter wavelengths from 00:06 to 07:28 UT on 2023 December 13. Based on the image morphology, we develop a method to identify individual Type I bursts on the dynamic spectra from a connected region with a ratio of the duration to bandwidth less than or equal to 3.8 and the area sum (total pixels) greater than 4. In total, 102,073 and 78,773 bursts are detected on right-hand circular polarization and left-hand circular polarization components, respectively. We find Type I bursts with a mean lifetime of 0.7 s, a mean bandwidth of 5.6 MHz, and a relative bandwidth Delta f/f0 of about 2%-3%. Consistent with the previous findings of hard X-ray pulses, microwave pulses, Type III bursts, and decimetric spikes, Type I bursts exhibit their duration, bandwidth, peak intensity, and area sum with a power-law distribution. From the linear fitting in log-log space, we obtain the slope index between 1 and 3.5 for various parameters. Meanwhile, Type I bursts display the mean polarization degree in the range from -22% to 33%, and different bursts have various degrees. We find that Type I bursts tend to appear as a chain, and the short periods of 0.92 and 1.22 s are detected in two burst chains. Our finding would be an observational constraint for the emission mechanism and physical model of solar Type I radio bursts. |
| 学科主题 | 天文学 ; 太阳与太阳系 |
| URL标识 | 查看原文 |
| 出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
| WOS关键词 | QUASI-PERIODIC PULSATIONS ; NOISE STORMS ; FREQUENCY-DISTRIBUTIONS ; EVOLUTION ; SIGNALS ; FLARE ; SOHO |
| 资助项目 | Strategic Priority Research Program of the Chinese Academy of Sciences; National Key R&D Program of China[2022YFF0503002]; National Key R&D Program of China[2022YFF0503000]; NSFC |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001498781500001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | Strategic Priority Research Program of the Chinese Academy of Sciences ; National Key R&D Program of China[2022YFF0503002, 2022YFF0503000] ; NSFC[12073081, 12250014] ; [XDB0560000] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28327]  |
| 专题 | 天文技术实验室 |
| 作者单位 | 1.Purple Mountain Observatory, Chinese Academy of Science, Nanjing, People's Republic of China; yzyang@pmo.ac.cn; 2.University of Science and Technology of China, Hefei, People's Republic of China; 3.Yunnan Observatory of Chinese Academy of Sciences, Kunming, People's Republic of China; 4.State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing, People's Republic of China; 5.National Space Science Center, Chinese Academy of Sciences, Beijing, People's Republic of China; 6.Shandong University, Weihai, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Yang, Yuzhi,Ning, Zongjun,Song, Yuxiang,et al. High-resolution Observational Features of Type I Solar Radio Bursts[J]. ASTROPHYSICAL JOURNAL,2025,985(2). |
| APA | Yang, Yuzhi.,Ning, Zongjun.,Song, Yuxiang.,Han, Yijie.,Tang, Xiaoyu.,...&Chang, Shuwang.(2025).High-resolution Observational Features of Type I Solar Radio Bursts.ASTROPHYSICAL JOURNAL,985(2). |
| MLA | Yang, Yuzhi,et al."High-resolution Observational Features of Type I Solar Radio Bursts".ASTROPHYSICAL JOURNAL 985.2(2025). |
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来源：云南天文台
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