VLBI astrometry of radio stars to link radio and optical celestial reference frames: observing strategies

doi:10.1093/mnras/stae705

XAO OpenIR

	VLBI astrometry of radio stars to link radio and optical celestial reference frames: observing strategies
	Zhang, Jingdong 1,2; Zhang, Bo 1; Xu, Shuangjing 1,3; Liu, Niu 4; Chen, Wen 5,6; Ding, Hao 1; Jiang, Pengfei7 ; Sun, Yan 1; Wang, Jinqing 1; Cui, Lang7 ; Wen, Shiming 1; Mai, Xiaofeng 1,2; Li, Jinling 1; Shu, Fengchun 1; Huang, Yidan 1
	2024-03-18
Source Publication	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN	0035-8711
Volume	529 Issue:3 Pages:2062-2070
Contribution Rank	7
Abstract	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.
Keyword	instrumentation: interferometers methods: data analysis astrometry proper motions reference systems
DOI	10.1093/mnras/stae705
Indexed By	SCI
Language	英语
WOS Keyword	CATALOG ; MICROARCSECOND
Funding Project	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 Research Area	Astronomy & Astrophysics
WOS Subject	Astronomy & Astrophysics
WOS ID	WOS:001186406700001
Publisher	OXFORD UNIV PRESS
Funding Organization	National Natural Science Foundation of China ; National Natural Science Foundation of China (NSFC) ; National SKA Program of China ; CAS 'Light of West China' Program
Citation statistics	Cited Times:3[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.xao.ac.cn/handle/45760611-7/6234
Collection	中国科学院新疆天文台
Corresponding Author	Zhang, Bo
Affiliation	1.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China 3.Korea Astron & Space Sci Inst, 776 Daedeok Daero, Daejeon 34055, South Korea 4.Nanjing Univ, Sch Astron & Space Sci, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing 210023, Peoples R China 5.Chinese Acad Sci, Yunnan Observ, Kunming 650216, Yunnan, Peoples R China 6.Yunnan Key Lab Solar Phys & Space Sci, Kunming 650216, Peoples R China 7.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1-St, Urumqi 830011, Peoples R China
Recommended Citation 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.

Files in This Item:
File Name/Size	DocType	Version	Access	License
Zhang-2024-VLBI astr（1006KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	View Application Full Text

File name:	Zhang-2024-VLBI astrometry of radio stars to l.pdf
Format:	Adobe PDF

If you have any objections to this item, please fill out the form below and the administrator will contact you as soon as possible.
Content:
Email：	*
Institution:
Verification Code:	Refresh

Any comments and suggestions are welcomed.
Title:	*
Content:
Email：	*
Verification Code:	Refresh

中国科学院新疆天文台机构知识库