论文标题
具有原始H-HE气氛的行星上潜在的长期宜居条件
Potential long-term habitable conditions on planets with primordial H-He atmospheres
论文作者
论文摘要
保留其原始，HE主导气氛的冷超级诞生的表面可能足够温暖，可以容纳液态水。这将归因于氢诱导的氢诱导的吸收（CIA），氢会随着压力而增加。但是，尚未探索该星球可居住的长期潜力。在这里，我们通过模拟不同核心质量，包络质量和半高轴的行星来研究这种潜在的外来宜居性的持续时间。我们发现，质量和超级地球行星的质量为$ \ sim $ 1-10 $ m _ {\ oplus} $可以在大于$ \ sim $ 2 au的径向距离下保持高达5-8 Gyr的温带表面条件。所需的包络质量为$ \ sim 10^{ - 4} \，m _ {\ oplus} $（比地球的尺寸高2个数量级），但可以是小（近距离）或更大的数量级（远距离）。该结果表明，应重新审视行星宜居性的概念，并在经典定义方面更具包容性。
Cold super-Earths which retain their primordial, H-He dominated atmosphere could have surfaces that are warm enough to host liquid water. This would be due to the collision induced absorption (CIA) of infra-red light by hydrogen, which increases with pressure. However, the long-term potential for habitability of such planet has not been explored yet. Here we investigate the duration of this potential exotic habitability by simulating planets of different core masses, envelope masses and semi-major axes. We find that terrestrial and super-Earth planets with masses of $\sim$1 - 10$M_{\oplus}$ can maintain temperate surface conditions up to 5 - 8 Gyr at radial distances larger than $\sim $2 AU. The required envelope masses are $\sim 10^{-4} \, M_{\oplus}$ (which is 2 orders of magnitude more massive than Earth's), but can be an order of magnitude smaller (when close-in) or larger (when far out). This result suggests that the concept of planetary habitability should be revisited and made more inclusive with respect to the classical definition.
