论文标题
小行星和生命：太阳系有多特别？
Asteroids and life: How special is the solar system?
论文作者
论文摘要
小行星对地球的影响可能通过创造有利的生命壁ni，对大气的变化和水的流放而在地球上的出现中起着至关重要的作用。因此，我们建议在系术系统中对生命的两个潜在要求：首先，该系统具有小行星带，其次是有一种驱动小行星影响陆地宜居行星的机制。由于在太阳系中，$ν_6$世俗共振在推动这些影响方面很重要，因此我们探讨了两个巨型行星的质量和位置如何确定这种世俗共振的位置和强度。检查观察到的具有两个巨型行星的超球星系，我们发现小行星带区域内的世俗共振可能并不罕见。因此，太阳系有些特别，但是生命的出现可能所必需的微调程度并不过分。最后，通过$ n $ body模拟，我们表明，当两个巨型行星接近2：1平均运动共振时，小行星带不稳定，但这不会导致小行星的增加。
Asteroid impacts with the Earth may have played an essential role in the emergence of life on Earth through their creation of favorable niches for life, changes to the atmosphere and delivery of water. Consequently, we suggest two potential requirements for life in an exoplanetary system: first, that the system has an asteroid belt, and second, that there is a mechanism to drive asteroids to impact the terrestrial habitable planet. Since in the solar system, the $ν_6$ secular resonance has been shown to have been important in driving these impacts, we explore how the masses and locations of two giant planets determine the location and strength of this secular resonance. Examining observed exoplanetary systems with two giant planets, we find that a secular resonance within the asteroid belt region may not be uncommon. Hence the solar system is somewhat special, but the degree of fine-tuning that may be necessary for the emergence of life is not excessive. Finally, with $n$-body simulations, we show that when the two giant planets are close to the 2:1 mean motion resonance, the asteroid belt is unstable but this does not lead to increased asteroid delivery.
