论文标题
土地放牧物体可能转移生命向外行星系统
Possible Transfer of Life by Earth-Grazing Objects to Exoplanetary Systems
论文作者
论文摘要
最近，发现了一个30厘米的物体，以放牧地球的大气层并转移到木星交叉轨道上。我们使用相关的调查参数来校准此类对象的总数。可能将陆地微生物从太阳系中导出的对象数量在$ 2 \ times 10^{9} $ - $ 3 \ times 10^{11} $中。我们发现$ 10^{7} $ - $ 10^{9} $在太阳系的一生中，二进制星系可能会捕获此类对象。采用信托假设，即每个物体都捡起一个多生血群落菌落，捕获时携带活菌落的物体的总数可能为$ 10 $ - $ 10^3 $。
Recently, a 30-cm object was discovered to graze the Earth's atmosphere and shift into a Jupiter-crossing orbit. We use the related survey parameters to calibrate the total number of such objects. The number of objects that could have exported terrestrial microbes out of the Solar System is in the range $2 \times 10^{9}$--$3 \times 10^{11}$. We find that $10^{7}$--$10^{9}$ such objects could have been captured by binary star systems over the lifetime of the Solar System. Adopting the fiducial assumption that one polyextremophile colony is picked up by each object, the total number of objects carrying living colonies on them upon capture could be $10$--$10^3$.
