‘Oumuamua and Borisov were the first two interstellar objects confirmed in the solar system. The upcoming commencement of the Vera C. Rubin Observatory’s Legacy Survey of Space of Time (LSST) will enhance greatly the discovery rate of interstellar objects. This raises the question, what can be learned from large-number statistics of interstellar objects? Here, we show that discovery statistics provided by LSST will allow low- and high-ejection-speed populations to be distinguished using the velocity dispersion and angular anisotropy of interstellar objects. These findings can be combined with physical characterizations to yield a better understanding of planetary system origin and nature.

中文翻译：

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星际天体从其出生系统射出速度的明显特征

'Oumuamua和Borisov是太阳系中确认的头两个星际天体。维拉·C·鲁宾天文台即将开展的时空传统调查（LSST）即将启动，这将大大提高星际天体的发现率。这就提出了一个问题，从星际物体的大量统计中可以学到什么？在这里，我们表明，由LSST提供的发现统计数据将允许使用星际天体的速度色散和角度各向异性来区分低速和高速喷射种群。这些发现可以与物理特征相结合，以更好地理解行星系统的起源和性质。