昴星团区域恒星Eichhorn自行和Hertzsprung自行的比较

A COMPARATIVE RESEARCH BETWEEN THE EICHHORN PROPER MOTIONS AND THE HERTZSPRUNG PROPER MOTIONS FOR STARS IN THE REGION OF THE PLEIADES

本文根据对数据的分析得出,在昴星团区域恒星的Eichhorn赤经自行和Hertzsprung赤经自行间的差值,系恒星在天球上相对位置的函数.给出了这种函数的形式.而对赤纬自行差值,则研究表明,此种函数关系不明显.同时,根据我们的实测数据,对这两种自行的精度分别做出了估计.本文对Eichhorn自行精度的估值比Eichhorn本人指出的略低;根据我们的估计,Hertzsprung自行两个分量的精度是不相等的,赤纬分量的精度低于赤经分量.

Based on the analysis of proper motions of stars in the region of pleiades, we obtained that the difference between Eichhorn's proper motions in R.A. and Hertzsprung's, were linear function of Star's relative position on the celesphere. The mathematical form of the function was given. But, the functional relationship was not obvious for the difference of the proper motion in declination. Using our determined proper motions in this region, we estimated the accuracies of these two kinds of proper motion. The accuracy of Eichhorn's proper motion is lower than that of given by Eichhorn et al.. Accoeding our estimations, the accuracies of Hertzsprung's in the two components were not the same, the accuracy in right assensing was higher than that in declination.