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arXiv 2107.10345astro-ph.EP
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小行星对:方法验证和新候选者

Asteroid pairs: method validation and new candidates

Ihor Kyrylenko, Yurij N. Krugly, Oleksiy Golubov

摘要:

一对小行星可以被描述为两个具有高度相似的日心轨道的小行星,它们在遗传上有联系,但没有引力约束。它们可以由小行星碰撞或旋转裂变产生。虽然已知有200多对小行星,但还有更多的小行星有待识别,特别是在新发现的小行星中。我们工作的目的是在主带的内部寻找新的小行星对,并在已知小行星对的样本上验证该管道。最初,我们选择对候选人在密切轨道要素的五维空间。然后,候选人确认使用数值模拟与回溯积分的轨道,包括来自最大的主带小行星的扰动,以及非引力Yarkovsky效应的影响。我们对主带的内部进行了调查,发现了10对新的可能的小行星对。它们的形成年龄估计在30至400 kyr之间。此外,我们的管道进行了测试的样本17个已知的对,我们的年龄估计同意在大多数情况下,在文献中指出的。

英文摘要:

An asteroid pair can be described as two asteroids with highly similar heliocentric orbits that are genetically related but not gravitationally bound. They can be produced by asteroid collisions or rotational fission. Although over 200 asteroid pairs are known, many more are remaining to be identified, especially among the newly discovered asteroids. The purpose of our work is to find new asteroid pairs in the inner part of the main belt with a new pipeline for asteroid pair search, as well as to validate the pipeline on a sample of known asteroid pairs. Initially, we select pair candidates in the five-dimensional space of osculating orbital elements. Then the candidates are confirmed using numerical modeling with the backtrack integration of their orbits including the perturbations from the largest main-belt asteroids, as well as the influence of the non-gravitational Yarkovsky effect. We performed a survey of the inner part of the main belt and found 10 new probable asteroid pairs. Their estimated formation ages lie between 30 and 400 kyr. In addition, our pipeline was tested on a sample of 17 known pairs, and our age estimates agreed with the ones indicated in literature in most of the cases.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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