Milliarcsecond Localization of the Repeating FRB 20201124A
文献类型：期刊论文
| 作者 | Nimmo, K.9,10; Hewitt, D. M.10; Hessels, J. W. T.9,10; Kirsten, F.7,9; Marcote, B.8; Bach, U.1; Blaauw, R.9; Burgay, M.2; Corongiu, A.2; Feiler, R.3 |
| 刊名 | Astrophysical Journal Letters
 |
| 出版日期 | 2022-03-01 |
| 卷号 | 927期号:1页码:12L3 |
| ISSN号 | 2041-8205 |
| 关键词 | fast radio-burst environment classifier Astronomy & Astrophysics |
| DOI | 10.3847/2041-8213/ac540f |
| 产权排序 | 10 |
| 文献子类 | Article |
| 英文摘要 | Very long baseline interferometric (VLBI) localizations of repeating fast radio bursts (FRBs) have demonstrated a diversity of local environments: from nearby star-forming regions to globular clusters. Here we report the VLBI localization of FRB 20201124A using an ad hoc array of dishes that also participate in the European VLBI Network (EVN). In our campaign, we detected 18 bursts from FRB 20201124A at two separate epochs. By combining the visibilities from both epochs, we were able to localize FRB 20201124A with a 1 sigma uncertainty of 2.7 mas. We use the relatively large burst sample to investigate astrometric accuracy and find that for greater than or similar to 20 baselines (greater than or similar to 7 dishes) we can robustly reach milliarcsecond precision even using single-burst data sets. Subarcsecond precision is still possible for single bursts, even when only similar to 6 baselines (four dishes) are available. In such cases, the limited uv coverage for individual bursts results in very high side-lobe levels. Thus, in addition to the peak position from the dirty map, we also explore smoothing the structure in the dirty map by fitting Gaussian functions to the fringe pattern in order to constrain individual burst positions, which we find to be more reliable. Our VLBI work places FRB 20201124A 710 +/- 30 mas (1 sigma uncertainty) from the optical center of the host galaxy, consistent with originating from within the recently discovered extended radio structure associated with star formation in the host galaxy. Future high-resolution optical observations, e.g., with Hubble Space Telescope, can determine the proximity of FRB 20201124A's position to nearby knots of star formation. |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000764325000001 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/5142]  |
| 专题 | 脉冲星研究团组 |
| 作者单位 | 1.Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany; 2.Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Cagliari, Via della Scienza 5, I-09047, Selargius, Italy; 3.Institute of Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Toruń, Poland; 4.Istituto Nazionale di Astrofisica, Istituto di Radioastronomia, Via Gobetti 101, I-40129, Bologna, Italy; 5.Institute of Applied Astronomy, Russian Academy of Sciences, Kutuzova Embankment 10, St. Petersburg, 191187, Russia; 6.Xinjiang Astronomical Observatory, 150 Science 1-Street, Urumqi, Xinjiang 830011, People’s Republic of China 7.Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, Sweden; 8.Joint Institute for VLBI ERIC (JIVE), Oude Hoogeveensedijk 4, 7991PD Dwingeloo, The Netherlands; 9.ASTRON, Netherlands Institute for Radio Astronomy, Oude Hoogeveensedijk 4, 7991 PD Dwingeloo, The Netherlands; k.nimmo@uva.nl; 10.Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands; |
| 推荐引用方式 GB/T 7714 | Nimmo, K.,Hewitt, D. M.,Hessels, J. W. T.,et al. Milliarcsecond Localization of the Repeating FRB 20201124A[J]. Astrophysical Journal Letters,2022,927(1):12L3. |
| APA | Nimmo, K..,Hewitt, D. M..,Hessels, J. W. T..,Kirsten, F..,Marcote, B..,...&Yuan, J..(2022).Milliarcsecond Localization of the Repeating FRB 20201124A.Astrophysical Journal Letters,927(1),12L3. |
| MLA | Nimmo, K.,et al."Milliarcsecond Localization of the Repeating FRB 20201124A".Astrophysical Journal Letters 927.1(2022):12L3. |
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