Exomoons may play an important role in determining the habitability of worlds outside of our solar system. They can stabilize conditions, alter the climate by breaking tidal locking with the parent star, drive tidal heating, and perhaps even host life themselves. However, the ability of an exoplanet to sustain an exomoon depends on complex tidal interactions. Motivated by this, we make use of simplified tidal lag models to follow the evolution of the separations and orbital and rotational periods in planet, star, and moon systems. We apply these models to known exoplanet systems to assess the potential for these exoplanets to host exomoons. We find that there are at least 36 systems in which an exoplanet in the habitable zone may host an exomoon for longer than one gigayear. This includes Kepler-1625b, an exoplanet with an exomoon candidate, which we determine would be able to retain a Neptune-sized moon for longer than a Hubble time. These results may help provide potential targets for future observation. In many cases, there remains considerable uncertainty in the composition of specific exoplanets. We show the detection (or not) of an exomoon would provide an important constraint on the planet structure due to differences in their tidal response.

中文翻译：

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潮汐对系外行星承载系外卫星的潜力的影响

系外卫星可能在确定太阳系外世界的宜居性方面发挥重要作用。它们可以稳定环境，通过打破与母星的潮汐锁定来改变气候，驱动潮汐加热，甚至可能自己承载生命。然而，系外行星维持系外卫星的能力取决于复杂的潮汐相互作用。受此启发，我们利用简化的潮汐滞后模型来跟踪行星、恒星和月球系统中间隔以及轨道和旋转周期的演变。我们将这些模型应用于已知的系外行星系统，以评估这些系外行星承载系外卫星的潜力。我们发现至少有 36 个系统，其中宜居带的系外行星可能承载系外卫星的时间超过 1 千兆年。这包括 Kepler-1625b，一颗带有系外卫星候选者的系外行星，我们确定这将能够比哈勃时间更长时间地保留海王星大小的卫星。这些结果可能有助于为未来的观察提供潜在的目标。在许多情况下，特定系外行星的组成仍然存在相当大的不确定性。我们表明，由于潮汐反应的差异，系外卫星的检测（或不检测）将对行星结构提供重要的限制。