VLBI astrometry of radio stars to link radio and optical celestial reference frames: observing strategies
文献类型：期刊论文
| 作者 | Zhang, Jingdong5,6; Zhang, Bo6; Xu, Shuangjing4,6; Liu, Niu3; Chen, Wen2,7; Ding, Hao6; Jiang, Pengfei1 ; Sun, Yan6; Wang, Jinqing6; Cui, Lang1
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2024-03-18 |
| 卷号 | 529期号:3页码:2062-2070 |
| 关键词 | instrumentation: interferometers methods: data analysis astrometry proper motions reference systems |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/stae705 |
| 产权排序 | 7 |
| 英文摘要 | 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 1 sigma 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. |
| WOS关键词 | CATALOG ; MICROARCSECOND |
| 资助项目 | National Natural Science Foundation of China[12103026] ; National Natural Science Foundation of China[12373074] ; National Natural Science Foundation of China (NSFC)[2022SKA0120102] ; National SKA Program of China[2021-XBQNXZ-005] ; CAS 'Light of West China' Program |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001186406700001 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China (NSFC) ; National SKA Program of China ; CAS 'Light of West China' Program |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/6233]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Zhang, Bo |
| 作者单位 | 1.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1-St, Urumqi 830011, Peoples R China 2.Chinese Acad Sci, Yunnan Observ, Kunming 650216, Yunnan, Peoples R China 3.Nanjing Univ, Sch Astron & Space Sci, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing 210023, Peoples R China 4.Korea Astron & Space Sci Inst, 776 Daedeok Daero, Daejeon 34055, South Korea 5.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China 6.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 7.Yunnan Key Lab Solar Phys & Space Sci, Kunming 650216, Peoples R 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.,Chen, Wen.,...&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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