FAST Observations of FRB 20220912A: Burst Properties and Polarization Characteristics
文献类型：期刊论文
| 作者 | Zhang,Yong-Kun15,16; Li,Di13,14,15,16; Zhang,Bing11,12; Cao,Shuo10,15; Feng,Yi14; Wang,Wei-Yang9,15; Qu,Yuanhong11,12; Niu,Jia-Rui15,16; Zhu,Wei-Wei16; Han,Jin-Lin16 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2023-09-27 |
| 卷号 | 955期号:2 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/aced0b |
| 通讯作者 | Zhang,Yong-Kun() |
| 英文摘要 | Abstract We report the observations of FRB 20220912A using the Five-hundred-meter Aperture Spherical radio Telescope. We conducted 17 observations totaling 8.67 hr and detected a total of 1076 bursts with an event rate up to 390 hr?1. The cumulative energy distribution can be well described using a broken power-law function with the lower- and higher-energy slopes of ?0.38 ± 0.02 and ?2.07 ± 0.07, respectively. We also report the L-band (1–1.5 GHz) spectral index of the synthetic spectrum of FRB 20220912A bursts, which is ?2.6 ± 0.21. The average rotation measure value of the bursts from FRB 20220912A is ?0.08 ± 5.39 rad m?2, close to 0 rad m?2 and was relatively stable over 2 months. Most bursts have nearly 100% linear polarization. About 45% of the bursts have circular polarization with Signal-to-Noise ratio > 3, and the highest circular polarization degree can reach 70%. Our observations suggest that FRB 20220912A is located in a relatively clean local environment with complex circular polarization characteristics. These various behaviors imply that the mechanism of circular polarization of FRBs likely originates from an intrinsic radiation mechanism, such as coherent curvature radiation or inverse Compton scattering inside the magnetosphere of the FRB engine source (e.g., a magnetar). |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:APJ_955_2_142 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/26337]  |
| 专题 | 云南天文台_射电天文研究组 |
| 通讯作者 | Zhang,Yong-Kun |
| 作者单位 | 1.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, Jiangsu 210023, People's Republic of China 2.South-Western Institute for Astronomy Research, Yunnan University, Kunming, Yunnan 650504, People's Republic of China 3.Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, People's Republic of China 4.School of Astronomy and Space Science, Nanjing University, Nanjing 210093, People's Republic of China 5.Department of Astronomy, School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, People's Republic of China 6.CSIRO Space and Astronomy, PO Box 76, Epping, NSW 1710, Australia 7.Cahill Center for Astronomy and Astrophysics, MC 249-17, California Institute of Technology, Pasadena, CA 91125, USA 8.CAS Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China 9.Department of Astronomy, Peking University, Beijing 100871, People's Republic of China 10.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Zhang,Yong-Kun,Li,Di,Zhang,Bing,et al. FAST Observations of FRB 20220912A: Burst Properties and Polarization Characteristics[J]. The Astrophysical Journal,2023,955(2). |
| APA | Zhang,Yong-Kun.,Li,Di.,Zhang,Bing.,Cao,Shuo.,Feng,Yi.,...&Cao S.(2023).FAST Observations of FRB 20220912A: Burst Properties and Polarization Characteristics.The Astrophysical Journal,955(2). |
| MLA | Zhang,Yong-Kun,et al."FAST Observations of FRB 20220912A: Burst Properties and Polarization Characteristics".The Astrophysical Journal 955.2(2023). |
入库方式： OAI收割
来源：云南天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。