The Discovery of a Rotating Radio Transient J1918-0449 with Intriguing Emission Properties with the Five-hundred-meter Aperture Spherical Radio Telescope
文献类型：期刊论文
| 作者 | Chen, J. L.7,8 ; Wen, Z. G.4,5,6,7; Yuan, J. P.6,7; Wang, N.6,7; Li, D.2,3,7; Wang, H. G.1,7; Yan, W. M.6,7; Yuen, R.7; Wang, P.3; Wang, Z.7,10
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| 刊名 | Astrophysical Journal
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| 出版日期 | 2022-07-01 |
| 卷号 | 934期号:1页码:24 |
| ISSN号 | 0004-637X |
| 关键词 | single-pulse modulation properties subpulse modulation magnetic-field microstructure pattern bursts ray turbulence searches Astronomy & Astrophysics |
| DOI | 10.3847/1538-4357/ac75d1 |
| 产权排序 | 2 |
| 文献子类 | Article |
| 英文摘要 | In this study, we report on a detailed single-pulse analysis of the radio emission from a rotating radio transient (RRAT) J1918-0449, which is discovered with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The sensitive observations were carried out on 2021 April 30 using the FAST with a central frequency of 1250 MHz and a short time resolution of 49.152 mu s, which forms a reliable basis to probe single-pulse emission properties in detail. The source was successively observed for around 2 hr. A total of 83 dispersed bursts with significance above 6 sigma are detected over 1.8 hr. The source's dispersion measure (DM) and rotational period are determined to be 116.1 +/- 0.4 pc cm(-3) and 2479.21 +/- 0.03 ms, respectively. The share of registered pulses from the total number of observed periods is 3.12%. No underlying emission is detected in the averaged off-pulse profile. For bursts with fluence larger than 10 Jy ms, the pulse energy follows a power-law distribution with an index of -3.1 +/- 0.4, suggesting the existence of bright pulse emission. We find that the distribution of time between subsequent pulses is consistent with a stationary Poisson process and find no evidence of clustering over the 1.8 hr observations, giving a mean burst rate of one burst every 66 s. Close inspection of the detected bright pulses reveals that 21 pulses exhibit well-defined quasiperiodicities. The subpulse drifting is present in nonsuccessive rotations with periodicity of 2.51 +/- 0.06 periods. Finally, possible physical mechanisms are discussed. |
| 语种 | 英语 |
| WOS记录号 | WOS:000828343400001 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/5126]  |
| 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 |
| 作者单位 | 1.School of Physics and Electronic Engineering, Guangzhou University, 510006, Guangzhou, Peopleʼs Republic of China; 2.NAOC-UKZN Computational Astrophysics Centre, University of KwaZulu-Natal, Durban, 4000, South Africa; 3.National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100101, Peopleʼs Republic of China; 4.Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guiyang, Guizhou, 550001, Peopleʼs Republic of China; 5.Key Laboratory of Microwave Technology, Urumqi, Xinjiang, 830011, Peopleʼs Republic of China; 6.Key laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing, 210008, Peopleʼs Republic of China; 7.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 150, Science-1 Street, Urumqi, Xinjiang, 830011, Peopleʼs Republic of China; 8.Department of Physics and Electronic Engineering, Yuncheng University, Yuncheng, Shanxi, 044000, Peopleʼs Republic of China; 9.Department of Physics, Huazhong University of Science and Technology, Wuhan, 430074, Peopleʼs Republic of China 10.School of Physical Science and Technology, Xinjiang University, urumqi, Xinjiang, 830046, Peopleʼs Republic of China; |
| 推荐引用方式 GB/T 7714 | Chen, J. L.,Wen, Z. G.,Yuan, J. P.,et al. The Discovery of a Rotating Radio Transient J1918-0449 with Intriguing Emission Properties with the Five-hundred-meter Aperture Spherical Radio Telescope[J]. Astrophysical Journal,2022,934(1):24. |
| APA | Chen, J. L..,Wen, Z. G..,Yuan, J. P..,Wang, N..,Li, D..,...&Gong, B. P..(2022).The Discovery of a Rotating Radio Transient J1918-0449 with Intriguing Emission Properties with the Five-hundred-meter Aperture Spherical Radio Telescope.Astrophysical Journal,934(1),24. |
| MLA | Chen, J. L.,et al."The Discovery of a Rotating Radio Transient J1918-0449 with Intriguing Emission Properties with the Five-hundred-meter Aperture Spherical Radio Telescope".Astrophysical Journal 934.1(2022):24. |
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