第三代国际天球参考架  

An Introduction of the 3rd Realization of the International Celestial Reference Frame(ICRF3)

作　　者：姜男 刘佳成[1,2] 朱紫[1,2] 刘牛 JIANG Nan;LIU Jia-cheng;ZHU Zi;LIU Niu(School of Astronomy and Space Science,Nanjing University,Nanjing 210023,China;Key Laboratory of Modern Astronomy and Astrophysics(Ministry of Education),Nanjing University,Nanjing 210023,China;School of Earth Sciences and Engineering,Nanjing University,Nanjing 210023,China)

机构地区：[1]南京大学天文与空间科学学院,南京210023 [2]南京大学教育部现代天文与天体物理重点实验室,南京210023 [3]南京大学地球科学与工程学院,南京210023

出　　处：《天文学进展》2023年第2期198-239,共42页Progress In Astronomy

基　　金：国家自然科学基金(11833004,12103026);中国博士后科学基金(2021M691530)。

摘　　要：第三代国际天球参考架(the 3rd realization of the International Celestial Reference Frame,ICRF3)于2019年1月1日起,代替其前代参考架第二代国际天球参考架(the 2nd realization of the International Celestial Reference Frame,ICRF2)成为最新的国际天球参考架,与国际天球参考系(the International Celestial Reference System,ICRS)在ICRF2的误差范围内指向一致。ICRF3发表后,在诸多领域中都发挥着至关重要的作用。ICRF3的新特点也给其数据的使用带来了影响。详细介绍ICRF3的基本性质,并对ICRF3的使用方法进行说明,还将ICRF3内部三个波段参考架,以及ICRF3与Gaia-CRF3进行了比较,检验了ICRF3参考架的稳定性,讨论了其中可能存在的系统误差。The 3rd realization of the International Celestial Reference Frame,ICRF3,has been the latest ICRF(the International Celestial Reference Frame)as the replacement of its previous realization,ICRF2,since January 1,2019.The ICRF3 is aligned to the ICRS(the International Celestial Reference System)to within the accuracy of the ICRF2.After its publication,the ICRF3 has played a vital role in many scientific disciplines.The ICRF3 has some largely improved characteristics compared to the ICRF1 and the ICRF2:(1)In addition to the traditional S/X band(8.4/2.3 GHz)reference frame,the ICRF3 also contains two higher frequency band frames,namely K band(24 GHz)and X/Ka band(8.4/32 GHz).(2)The ICRF3 is the first reference frame that considers the influence of the Galactic aberration effect,and reports the source position at the epoch of 2015.0.Having an overall understanding of the ICRF3,especially its new features,is very important for using it correctly.In this paper,we introduce the basic information of the ICRF3 in detail,and offer guidelines for users.We also provide comparisons between the different band frames of the ICRF3,and between the ICRF3 and the Gaia-CRF3.Through the comparisons of different catalogues,we test the stability of the ICRF3,and discuss the systematic errors in it.

关 键 词：参考架 干涉测量 银河系 自行 

分 类 号：P129[天文地球—天体测量]