论文标题
与太阳系的近距离遇到的分析
Analysis of Close Stellar Encounters with the Solar System
论文作者
论文摘要
我们考虑与太阳系相遇的36名候选人（在1 pc之内）。这些恒星已根据对各种作者获得的运动的分析结果进行了选择。对于此列表中的大多数恒星，运动学特征是从Gaia DR2目录中获取的。这些恒星与太阳系相遇的参数已经使用三种方法计算出来：（1）线性一个方法，（2）环保一个，以及（3）通过在轴对称电势中集成轨道。我们得出的结论是，这种环环节方法仅在不超过$ \ pm $ 1 MYR的时间间隔内效果很好。基于第三种方法，与第一种方法非常吻合，我们首次获得了以下估计明星Gaia DR2 31300334234235815424：$ t_ {min} = -0.62 \ 0.62 \ pm0.12 $和$ d_ myr和$ d_ {min} = 0.30 \ pm0.30 \ pm0.10 $ PC。
We consider 36 candidates for close (within 1 pc) encounters with the Solar system. These stars have been selected in accordance with the results of an analysis of their motion obtained by various authors. For most stars from this list the kinematic characteristics have been taken from the Gaia DR2 catalogue. The parameters of the encounters of these stars with the Solar system have been calculated using three methods: (1) the linear one, (2) the epicyclic one, and (3) by integrating the orbits in an axisymmetric potential. We have concluded that the epicyclic method works quite well only on a time interval no longer than $\pm$1 Myr. Based on the third method, in good agreement with the first method, for the first time we have obtained the following estimates of the encounter parameters for the star Gaia DR2 3130033734235815424: $t_{min}=-0.62\pm0.12$ Myr and $d_{min}=0.30\pm0.10$ pc.
