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| FAST Observations of an Extremely Active Episode of FRB 20201124A. II. Energy Distribution | |
Zhang, Yong-Kun1,2,3; Wang, Pei1; Feng, Yi3; Zhang, Bing4,5; Li, Di1,2,3,6; Tsai, Chao-Wei1; Niu, Chen-Hui1; Luo, Rui7; Yao, Ju-Mei8 ; Zhu, Wei-Wei1; Han, Jin-Lin1,2; Lee, Ke-Jia9; Zhou, De-Jiang1,2; Niu, Jia-Rui1,2; Jiang, Jin-Chen9; Wang, Wei-Yang9,10; Zhang, Chun-Feng9; Xu, Heng9; Wang, Bo-Jun9; Xu, Jiang-Wei9
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| 2022-12-01 | |
| Source Publication | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| ISSN | 1674-4527 |
| Volume | 22Issue:12Pages:124002 |
| Contribution Rank | 8 |
| Abstract | 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). |
| Keyword | (stars ) pulsars general stars individual (FRB 20201124A) methods data analysis |
| DOI | 10.1088/1674-4527/ac98f7 |
| Indexed By | SCI ; CSCD |
| Language | 英语 |
| WOS Keyword | FAST RADIO-BURST ; LUMINOSITY ; LOCALIZATION |
| Funding Project | 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 Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000905282100001 |
| CSCD ID | CSCD:7375335 |
| Publisher | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| Funding Organization | 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 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/5021 |
| Collection | 射电天文研究室_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 |
| Corresponding Author | Li, Di |
| Affiliation | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Zhejiang Lab, Res Ctr Intelligent Comp Platforms, Hangzhou 311100, Peoples R China 4.Univ Nevada, Dept Phys & Astron, Las Vegas, NV 89154 USA 5.Univ Nevada, Nevada Ctr Astrophys, Las Vegas, NV 89154 USA 6.Univ KwaZulu Natal, NAOC UKZN Computat Astrophys Ctr, ZA-4000 Durban, South Africa 7.CSIRO Space & Astron, POB 76, Epping, NSW 1710, Australia 8.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 9.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 10.Peking Univ, Dept Astron, Beijing 100871, Peoples R China |
| Recommended Citation 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):124002. |
| 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),124002. |
| 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):124002. |
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| Zhang-2022-FAST Obse（1466KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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