| VLBI astrometry of radio stars to link radio and optical celestial reference frames: Observing strategies | |
Zhang, Jingdong1,2; Zhang, Bo1; Xu, Shuangjing1,3; Liu, Niu4; Chen W(陈文)5,6 ; Ding, Hao1; Jiang, Pengfei7; Sun, Yan1; Wang, Jinqing7; Cui, Lang1; Wen, Shiming1,2; Mai, Xiaofeng1; Li, Jinling1; Shu, Fengchun1; Huang, Yidan1
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| 发表期刊 | Monthly Notices of the Royal Astronomical Society
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| 2024-04-01 | |
| 卷号 | 529期号:3页码:2062-2070 |
| DOI | 10.1093/mnras/stae705 |
| 产权排序 | 第5完成单位 |
| 收录类别 | EI |
| 关键词 | instrumentation: interferometers methods: data analysis astrometry proper motions reference systems |
| 摘要 | The Gaia celestial reference frame (Gaia-CRF) will benefit from a close assessment with independent methods, such as Very Long Baseline Interferometry (VLBI) measurements of radio stars at bright magnitudes. However, obtaining full astrometric parameters for each radio star through VLBI measurements demands a significant amount of observation time. This study proposes an efficient observing strategy that acquires double-epoch VLBI positions to measure the positions and proper motions of radio stars at a reduced cost. The solution for CRF link compatible with individual VLBI position measurements is introduced, and the optimized observing epoch scheduling is discussed. Applying this solution to observational data yields results sensitive to sample increase or decrease, yet they remain consistently in line with the literature at the 1σ level. This suggests the potential for improvement with a larger sample size. Simulations show that the double-epoch strategy reduces CRF link parameter uncertainties by over 30 per cent compared to the five-parameter strategy. © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. |
| 资助项目 | N/A |
| 项目资助者 | National Natural Science Foundation of China[12103026, 12373074] ; National Natural Science Foundation of China (NSFC)[2022SKA0120102] ; National SKA Program of China[2021-XBQNXZ-005] ; CAS 'Light of West China' Program |
| 语种 | 英语 |
| 学科领域 | 天文学 |
| 文章类型 | Article |
| 出版者 | OXFORD UNIV PRESS |
| 出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
| ISSN | 0035-8711 |
| URL | 查看原文 |
| WOS记录号 | WOS:001186406700001 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | CATALOG ; MICROARCSECOND |
| EI入藏号 | 20241215789697 |
| EI主题词 | Stars |
| EI分类号 | 657.2 Extraterrestrial Physics and Stellar Phenomena - 723.2 Data Processing and Image Processing - 941.4 Optical Variables Measurements |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/26563 |
| 专题 | 射电天文研究组 |
| 作者单位 | 1.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai, 200030, China; 2.University of Chinese Academy of Sciences, School of Astronomy and Space Sciences, No.19 (A) Yuquan Rd, Shijingshan, Beijing, 100049, China; 3.Korea Astronomy and Space Science Institute, 776 Daedeok-daero, Yuseong-gu, Daejeon, 34055, Korea, Republic of; 4.School of Astronomy and Space Science, Key Laboratory of Modern Astronomy and Astrophysics (Ministry of Education), Nanjing University, Nanjing, 210023, China; 5.Yunnan Observatories, Chinese Academy of Sciences, Yunnan, Kunming, 650216, China; 6.Yunnan Key Laboratory of the Solar Physics and Space Science, Kunming, 650216, China; 7.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 150 Science 1-Street, Urumqi, 830011, China |
| 推荐引用方式 GB/T 7714 | Zhang, Jingdong,Zhang, Bo,Xu, Shuangjing,et al. VLBI astrometry of radio stars to link radio and optical celestial reference frames: Observing strategies[J]. Monthly Notices of the Royal Astronomical Society,2024,529(3):2062-2070. |
| APA | Zhang, Jingdong.,Zhang, Bo.,Xu, Shuangjing.,Liu, Niu.,陈文.,...&Huang, Yidan.(2024).VLBI astrometry of radio stars to link radio and optical celestial reference frames: Observing strategies.Monthly Notices of the Royal Astronomical Society,529(3),2062-2070. |
| MLA | Zhang, Jingdong,et al."VLBI astrometry of radio stars to link radio and optical celestial reference frames: Observing strategies".Monthly Notices of the Royal Astronomical Society 529.3(2024):2062-2070. |
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| VLBI astrometry of r（1007KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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