Trans-Neptunian binaries are among the objects carrying the most relevant information on the conditions that prevailed in the primitive outer Solar system. However, their present orbital architecture not necessarily reflects those conditions, because it is the result of complex evolutionary processes. There is evidence suggesting that binary systems dominated the primitive trans-Neptunian populations. Therefore, binary–binary interactions could be an important evolutionary path. In this paper, a series of numerical experiments of binary–binary close encounters were carried out, varying specific parameters related to their physical and orbital characteristics. The relative speeds with which the encounters occur play an important role in the relative variation of orbital elements, showing a good agreement with impulsive approximation models involving a binary and a single intruder. However, simulations varying the mass, semimajor axis, and closest approach distance between pairs of binaries, showed marked deviations from this model.

中文翻译：

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柯伊伯带中的二元-二元近距离相遇

跨海王星双星是携带有关原始外太阳系普遍条件的最相关信息的天体之一。然而，它们目前的轨道结构不一定反映这些条件，因为它是复杂进化过程的结果。有证据表明，二元系统主导了原始的跨海王星种群。因此，二元-二元相互作用可能是一条重要的进化路径。在本文中，进行了一系列双星近距离接触的数值实验，改变了与其物理和轨道特性相关的特定参数。相遇发生的相对速度在轨道元素的相对变化中起着重要作用，显示与涉及二进制和单个入侵者的脉冲近似模型的良好一致性。然而，改变双星对之间的质量、半长轴和最近接近距离的模拟显示出与该模型的显着偏差。