文章基本信息

标题：Implications of Captured Interstellar Objects for Panspermia and Extraterrestrial Life
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作者：Manasvi Lingam ; Abraham Loeb
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2018
卷号：156
期号：5
页码：1-8
DOI：10.3847/1538-3881/aae09a
语种：English
出版社：American Institute of Physics
摘要：We estimate the capture rate of interstellar objects by means of three-body gravitational interactions. We apply this model to the Sun–Jupiter system and the Alpha Centauri A&B binary system, and find that the radius of the largest captured object is a few tens of km and Earth-sized, respectively. We explore the implications of our model for the transfer of life by means of rocky material. The interstellar comets captured by the “fishing net” of the solar system can be potentially distinguished by their differing orbital trajectories and ratios of oxygen isotopes through high-resolution spectroscopy of water vapor in their tails.
关键词：astrobiology;comets: general;meteorites, meteors, meteoroids;minor planets, asteroids: general;planets and satellites: surfaces