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.1,4; Wen,Z. G.2,3,4,5; Yuan,J. P.3,4; Wang,N.3,4; Li,D.4,9,10; Wang,H. G.4,8; Yan,W. M.3,4; Yuen,R.4; Wang,P.10; Wang,Z.4,7 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2022-07-01 |
| 卷号 | 934期号:1 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ac75d1 |
| 通讯作者 | Wen,Z. G.() |
| 英文摘要 | Abstract 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 μs, 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 6σ 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 | IOP:APJ_934_1_24 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/6162]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Wen,Z. G. |
| 作者单位 | 1.Department of Physics and Electronic Engineering, Yuncheng University, Yuncheng, Shanxi, 044000, People's Republic of China 2.Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guiyang, Guizhou, 550001, People's Republic of China 3.Key laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing, 210008, People's Republic of China 4.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 150, Science-1 Street, Urumqi, Xinjiang, 830011, People's Republic of China 5.Key Laboratory of Microwave Technology, Urumqi, Xinjiang, 830011, People's Republic of China 6.Department of Physics, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China 7.School of Physical Science and Technology, Xinjiang University, urumqi, Xinjiang, 830046, People's Republic of China 8.School of Physics and Electronic Engineering, Guangzhou University, 510006, Guangzhou, People's Republic of China 9.NAOC-UKZN Computational Astrophysics Centre, University of KwaZulu-Natal, Durban, 4000, South Africa 10.National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100101, People's 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]. The Astrophysical Journal,2022,934(1). |
| 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.The Astrophysical Journal,934(1). |
| 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".The Astrophysical Journal 934.1(2022). |
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