Institutional Repository of Radio Astronomy Research Laboratory
| 奇台低频射电阵列在18～50MHz首次探测到II型射电暴 | |
| Alternative Title | Type II Radio Burst was Detected for the First Time by Qitai LFRA at 18-50 MHz |
杨文军1,2 ; 王震1,2; 平劲松3,4; 严发宝5; 路光5; 王明远3,4; 沈玉梅4; 许丙强5; 白宇5
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| 2023-05-01 | |
| Source Publication | 天文研究与技术
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| ISSN | 1672-7673 |
| Volume | 20Issue:3Pages:227-233 |
| Contribution Rank | 1 |
| Abstract | II型射电暴是日冕抛射物质（Coronal Mass Ejections， CME）的最佳示踪器，当CME的速度超过本地阿尔芬速度时，会产生日冕激波或行星际激波，并对地球的磁层产生十分剧烈的影响，在射电波段观测到II型射电暴也就意味着观测到了日冕激波，预测激波到达地球的时间，是空间天气预报的重要内容之一。2021年9月28日06:20UT左右，奇台低频射电阵列（Qitai low-frequency radio array， Qitai LFRA）首次探测到一次II型射电暴爆发事件，频率覆盖范围为18～50MHz，持续时间10多分钟。由于在极低频（<40MHz）频段基本上还没有进行过具有有效空间分辨率的观测，未来在这个频段发现未知现象的可能性极大。观测结果表明Qitai LFRA性能良好（增益典型值6dBi）、灵敏度高（－78dBm/125kHz，动态范围72dB），可以在25周太阳活动峰年发挥独特作用。 |
| Other Abstract | Type II radio bursts are the best tracers of Coronal Mass Ejections (CME). The coronal or interplanetary shocks are generated along with a dramatic effect on the Earth′s magnetosphere, when CME exceed the local Alfin velocity. The detection of type II radio bursts in the radio band manifests the generation of coronal shock waves. The prediction of the arrival time of shock waves to the Earth is essential to the space weather prediction. Type II radio burst was detected for the first time by Qitai low frequency (Qitai LFRA) at around 06:20 UT on September 28, 2021, with a frequency coverage of 18-50 MHz and a duration of more than 10 minutes. Since virtually no observation with effective spatial resolution have been made at extremely low frequency (<40 MHz) band, there is a great possibility to discover unknown phenomena at this band in future. Our observation shows that Qitai LFRA has good performance (Typical gain: 6 dBi) and high sensitivity (-78 dBm/125 kHz, DR: 72 dB), and can play a unique role in the 25~(th) annual solar activity peak. |
| Keyword | II型射电暴 日冕抛射物质 奇台低频射电阵列 极低频 |
| DOI | 10.14005/j.cnki.issn1672-7673.20230320.006 |
| URL | 查看原文 |
| Indexed By | CSCD |
| Language | 中文 |
| CSCD ID | CSCD:7465204 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/6636 |
| Collection | 射电天文研究室_行星科学研究团组 |
| Corresponding Author | 杨文军 |
| Affiliation | 1.中国科学院新疆天文台; 2.新疆射电天体物理重点实验室; 3.中国科学院大学天文与空间科学学院; 4.中国科学院国家天文台; 5.山东大学威海校区 |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | 杨文军,王震,平劲松,等. 奇台低频射电阵列在18～50MHz首次探测到II型射电暴[J]. 天文研究与技术,2023,20(3):227-233. |
| APA | 杨文军.,王震.,平劲松.,严发宝.,路光.,...&白宇.(2023).奇台低频射电阵列在18～50MHz首次探测到II型射电暴.天文研究与技术,20(3),227-233. |
| MLA | 杨文军,et al."奇台低频射电阵列在18～50MHz首次探测到II型射电暴".天文研究与技术 20.3(2023):227-233. |
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| File Name/Size | DocType | Version | Access | License | ||
| 杨文军-2023-奇台低频射电阵列在18（1938KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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