The influence of galactic aberration on precession parameters determined from VLBI observations

被引：9
作者：
Malkin, Z. M. [1 ]
机构：
[1] Russian Acad Sci, Main Pulkovo Astron Observ, St Petersburg 196140, Russia
来源：
ASTRONOMY REPORTS | 2011年 / 55卷 / 09期
关键词：
SECULAR ABERRATION; ASTROMETRY; ACCURACY; GEODESY; MODELS; SYSTEM;
D O I：
10.1134/S1063772911090058
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The influence of proper motions of sources due to Galactic aberration on precession models based on VLBI data is determined. Comparisons of the linear trends in the coordinates of the celestial pole obtained with and without taking into account Galactic aberration indicate that this effect can reach 20 A mu as per century, which is important for modern precession models. It is also shown that correcting for Galactic aberration influences the derived parameters of low-frequency nutation terms. It is therefore necessary to correct for Galactic aberration in the reduction of modern astrometric observations.
引用
收藏
页码：810 / 815
页数：6
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