VLBI Astrometry of radio stars to link radio and optical celestial reference frames. I. HD 199178 & AR Lacertae | |
Chen W(陈文)3,4,5,6,7; Zhang, Bo2; Zhang, Jingdong2,6; Yang, Jun4; Xu, Shuangjing1,2; Sun, Yan2; Mai, Xiaofeng2,6; Shu, Fengchun2; Wang M(汪敏)3,5,7 | |
刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
2023-07-29 | |
卷号 | 524期号:4页码:5357-5367 |
关键词 | radio continuum: stars astrometry parallaxes proper motions reference systems |
ISSN号 | 0035-8711 |
DOI | 10.1093/mnras/stad1214 |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | To accurately link the radio and optical Celestial Reference Frames (CRFs) at optical bright end, i.e. with GaiaG-band magnitude less than or similar to 13, increasing number and improving sky distribution of radio stars with accurate astrometric parameters from both Very Long Baseline Interferometry (VLBI) and Gaia measurements are mandatory. We selected two radio stars HD 199178 and AR Lacertae as the target for a pilot program for the frame link, using the Very Long Baseline Array at 15 GHz at six epochs spanning about 1 yr, to measure their astrometric parameters. The measured parallax of HD 199178 is 8.949 +/- 0.059 mas and the proper motion is mu(alpha)cos delta = 26.393 +/- 0.093 and mu(delta) = -0.950 +/- 0.083 mas yr(-1), while the parallax of AR Lac is 23.459 +/- 0.094 mas and the proper motion is mu alpha(c)os delta= -51.906 +/- 0.138 and mu(delta) = 46.732 +/- 0.131 mas yr(-1). Our VLBI measured astrometric parameters have accuracies about 4-5 times better than the corresponding historic VLBI measurements and comparable accuracies with those from Gaia, validating the feasibility of frame link using radio stars. With the updated astrometric parameters for these two stars, there is a similar to 25 per cent reduction of the uncertainties on the Y-axis for both orientation and spin parameters. |
学科主题 | 天文学 ; 射电天文学 |
URL标识 | 查看原文 |
出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
资助项目 | National Natural Science Foundation of China (NSFC)[U2031212] ; National Natural Science Foundation of China (NSFC)[11903079] |
WOS关键词 | EMISSION |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:001048643800020 |
资助机构 | National Natural Science Foundation of China (NSFC)[U2031212, 11903079] |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/26182] |
专题 | 云南天文台_射电天文研究组 |
通讯作者 | Chen W(陈文); Zhang, Bo |
作者单位 | 1.Korea Astronomy and Space Science Institute, 776 Daedeok-daero, Yuseong-gu, Daejeon 34055, Republic of Korea 2.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, China; 3.Yunnan Key Laboratory of the Solar physics and Space Science, Kunming 650216, China; 4.Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, Sweden; 5.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China; 6.University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing 100049, China; 7.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, Yunnan, China; |
推荐引用方式 GB/T 7714 | Chen W,Zhang, Bo,Zhang, Jingdong,et al. VLBI Astrometry of radio stars to link radio and optical celestial reference frames. I. HD 199178 & AR Lacertae[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2023,524(4):5357-5367. |
APA | Chen W.,Zhang, Bo.,Zhang, Jingdong.,Yang, Jun.,Xu, Shuangjing.,...&Wang M.(2023).VLBI Astrometry of radio stars to link radio and optical celestial reference frames. I. HD 199178 & AR Lacertae.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,524(4),5357-5367. |
MLA | Chen W,et al."VLBI Astrometry of radio stars to link radio and optical celestial reference frames. I. HD 199178 & AR Lacertae".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 524.4(2023):5357-5367. |
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