太阳系质心加速度的确定及其对ICRS的影响

发布时间：2018-03-31 02:07

本文选题：太阳系质心　切入点：ICRS　出处：《天文学报》2016年02期

【摘要】：正自1998年1月1日开始,国际天球参考系由一组遥远的射电源实现,取代了传统的恒星参考架.河外源的距离在亿光年尺度,实现了在空间固定的天球参考架.光行差效应由观测者的运动引起,与天体的距离无关.由于太阳系质心在空间的运动存在着微小的加速度,该加速度引起长期光行差发生漂移,使得在太阳系质心处观测到的河外射电源的位置有长期的偏折.空间固定的参考架为该观测现象提供了观测资料,进而可以确定太阳系质心在空间的运动加速度.
[Abstract]:Since January 1, 1998, the international celestial sphere reference system has been implemented by a set of remote radio sources, replacing the traditional stellar reference frame.The outer distance of the river is at a billion light-year scale, realizing a fixed celestial reference frame in space.The effect of optical aberration is caused by the motion of the observer and is independent of the distance of the celestial body.Due to the small acceleration of the center of mass in space, the acceleration causes the drift of the long-term optical aberration, which makes the position of the extragalactic radio source observed at the center of the solar system deflected for a long time.The fixed reference frame provides the observational data for the observation, and then the acceleration of the center of mass in the solar system can be determined.
【作者单位】：中国科学院上海天文台;
【分类号】：P182

【相似文献】