FAST Observations of an Extremely Active Episode of FRB 20201124A. II. Energy Distribution
文献类型：期刊论文
| 作者 | Zhang, Yong-Kun8,9,10; Wang, Pei10; Feng, Yi8; Zhang, Bing6,7; Li, Di5,8,9,10; Tsai, Chao-Wei10; Niu, Chen-Hui10; Luo, Rui4; Yao, Ju-Mei3 ; Zhu, Wei-Wei10
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| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2022-12-01 |
| 卷号 | 22期号:12页码:11 |
| ISSN号 | 1674-4527 |
| 关键词 | (stars ) pulsars general stars individual (FRB 20201124A) methods data analysis |
| DOI | 10.1088/1674-4527/ac98f7 |
| 通讯作者 | Li, Di(dili@nao.cas.cn) |
| 英文摘要 | We report the properties of more than 800 bursts detected from the repeating fast radio burst (FRB) source FRB 20201124A with the Five-hundred-meter Aperture Spherical radio Telescope (FAST) during an extremely active episode on UTC 2021 September 25-28 in a series of four papers. In this second paper of the series, we study the energy distribution of 881 bursts (defined as significant signals separated by dips down to the noise level) detected in the first four days of our 19 hr observational campaign spanning 17 days. The event rate initially increased exponentially but the source activity stopped within 24 hr after the 4th day. The detection of 542 bursts in one hour during the fourth day marked the highest event rate detected from one single FRB source so far. The bursts have complex structures in the time-frequency space. We find a double-peak distribution of the waiting time, which can be modeled with two log-normal functions peaking at 51.22 ms and 10.05 s, respectively. Compared with the emission from a previous active episode of the source detected with FAST, the second distribution peak time is smaller, suggesting that this peak is defined by the activity level of the source. We calculate the isotropic energy of the bursts using both a partial bandwidth and a full bandwidth and find that the energy distribution is not significantly changed. We find that an exponentially connected broken-power law function can fit the cumulative burst energy distribution well, with the lower and higher-energy indices being -1.22 +/- 0.01 and -4.27 +/- 0.23, respectively. Assuming a radio radiative efficiency of eta ( r ) = 10(-4), the total isotropic energy of the bursts released during the four days when the source was active is already 3.9 x 10(46) erg, exceeding similar to 23% of the available magnetar dipolar magnetic energy. This challenges the magnetar models which invoke an inefficient radio emission (e.g., synchrotron maser models). |
| WOS关键词 | FAST RADIO-BURST ; LUMINOSITY ; LOCALIZATION |
| 资助项目 | National Natural Science Foundation of China (NSFC)[11988101] ; National Natural Science Foundation of China (NSFC)[11725313] ; National Natural Science Foundation of China (NSFC)[U2031117] ; National Natural Science Foundation of China (NSFC)[11833009] ; National Natural Science Foundation of China (NSFC)[12041303] ; Open Project Program of the Key Laboratory of FAST, Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS[2021055] ; CAS Project for Young Scientists in Basic Research[YSBR-006] ; Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMS-CAS ; Key Research Project of Zhejiang Lab[2021PE0AC0] ; Key Research Program of the Chinese Academy of Sciences[QYZDJ-SSW-SLH021] ; Cultivation Project for the FAST scientific Payoff and Research Achievement of CAMS-CAS ; National SKA Program of China[2020SKA0120200] ; CAS-MPG LEGACY project ; Max-Planck Partner Group |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| WOS记录号 | WOS:000905282100001 |
| 资助机构 | National Natural Science Foundation of China (NSFC) ; Open Project Program of the Key Laboratory of FAST, Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS ; CAS Project for Young Scientists in Basic Research ; Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMS-CAS ; Key Research Project of Zhejiang Lab ; Key Research Program of the Chinese Academy of Sciences ; Cultivation Project for the FAST scientific Payoff and Research Achievement of CAMS-CAS ; National SKA Program of China ; CAS-MPG LEGACY project ; Max-Planck Partner Group |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/5020]  |
| 专题 | 脉冲星研究团组 科研仪器设备产出_我台利用FAST观测数据文章 |
| 通讯作者 | Li, Di |
| 作者单位 | 1.Peking Univ, Dept Astron, Beijing 100871, Peoples R China 2.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 4.CSIRO Space & Astron, POB 76, Epping, NSW 1710, Australia 5.Univ KwaZulu Natal, NAOC UKZN Computat Astrophys Ctr, ZA-4000 Durban, South Africa 6.Univ Nevada, Nevada Ctr Astrophys, Las Vegas, NV 89154 USA 7.Univ Nevada, Dept Phys & Astron, Las Vegas, NV 89154 USA 8.Zhejiang Lab, Res Ctr Intelligent Comp Platforms, Hangzhou 311100, Peoples R China 9.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 10.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Yong-Kun,Wang, Pei,Feng, Yi,et al. FAST Observations of an Extremely Active Episode of FRB 20201124A. II. Energy Distribution[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2022,22(12):11. |
| APA | Zhang, Yong-Kun.,Wang, Pei.,Feng, Yi.,Zhang, Bing.,Li, Di.,...&Xu, Jiang-Wei.(2022).FAST Observations of an Extremely Active Episode of FRB 20201124A. II. Energy Distribution.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,22(12),11. |
| MLA | Zhang, Yong-Kun,et al."FAST Observations of an Extremely Active Episode of FRB 20201124A. II. Energy Distribution".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 22.12(2022):11. |
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