Abstract

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: \(t_{\textrm{min}}=-0.62\pm 0.12\) Myr and \(d_{\textrm{min}}=0.30\pm 0.10\) pc.

中文翻译：

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与太阳系近距离恒星相遇的分析

摘要

我们考虑与太阳系进行近距离（不超过1个）的36个候选对象。这些星星是根据不同作者对它们的运动进行分析的结果选择的。对于该列表中的大多数恒星，其运动学特征均来自Gaia DR2目录。这些恒星与太阳系相遇的参数已使用三种方法进行了计算：（1）线性方法，（2）周转方法和（3）通过将轨道整合到轴对称势中。我们已经得出结论，周转法仅在不大于\（{\ pm} 1 \）的时间间隔内才能很好地工作玛尔 在第三种方法的基础上，与第一种方法非常吻合，这是我们首次获得有关Gaia DR2 3130033734235815424恒星的相遇参数的以下估计：\（t _ {\ textrm {min}} = -0.62 \ pm 0.12 \） Myr和\（d _ {\ textrm {min}} = 0.30 \ pm 0.10 \） pc。