Title: On the Encounter Rate of Open Star Clusters Show Chinese title

Title: 关于开放星团的遭遇率

Abstract: Probable past and future close encounters of open clusters with known characteristics over 64 million years have been calculated by integrating the orbits of cluster centers in the Galactic potential using the _galpy_ package. It has been shown that in the Galactic neighborhood of the Sun, pairwise cluster encounters at distances comparable to or smaller than their sizes occur at a characteristic rate of 35 to 40 events per 1 Myr. Close encounters between open clusters with a significant age difference occur at a rate of 15 events per Myr. It can be expected that in the Galaxy as a whole, such events occur an order of magnitude more frequently per unit time. Thus, dynamical interactions between stellar ensembles of different ages may not be too rare and could influence the properties of stellar populations. A pair of clusters with similar ages: HSC 1428 and Gulliver 22 was identified as a likely physically bound binary cluster system. A forecast of expected close encounters over the next 32 Myr has been provided for 490 pairs of clusters. Currently, 29 pairs of clusters are at their closest approach. Show Chinese abstract

Abstract: 通过在银河系势场中积分星团中心的轨道，并使用_galpy_包，已经计算了6400万年内已知特征的开放星团可能的过去和未来近距离相遇。 已经表明，在太阳的银河系邻域内，距离相当于或小于其大小的成对星团相遇的特征速率为每1百万年35到40次事件。 具有显著年龄差异的开放星团之间的近距离相遇速率为每百万年15次。 可以预期，在整个银河系中，单位时间内此类事件的发生频率要高一个数量级。 因此，不同年龄的恒星集合之间的动力学相互作用可能并不太罕见，并可能影响恒星种群的特性。 一对年龄相似的星团：HSC 1428和Gulliver 22被识别为可能的物理上束缚的双星团系统。 已经为490对星团提供了未来32百万年的预期近距离相遇预报。 目前，有29对星团处于它们最接近的接触点。