论文标题
恒星活动对潮汐锁定陆生外行星的影响的3D建模：大气成分和可居住性
3D modelling of the impact of stellar activity on tidally locked terrestrial exoplanets: atmospheric composition and habitability
论文作者
论文摘要
恒星耀斑对横向行星的潜在宜居性提出了挑战，该行星通过诱导大气成分的变化并以大量的紫外线照射地球表面来绕着M矮星星划分。为了检查它们的影响，我们将一般循环模型与光化学动力学方案结合在一起，以检查地球样大气对恒星耀斑和冠状质量弹出的反应和变化。我们发现，与静态恒星相比，恒星耀斑使大气中的臭氧量增加了20倍。我们发现，冠状质量弹出物质上会产生重要水平的潜在生物签名，例如n $ _2 $ o。大气成分的变化导致到达行星表面的紫外线的量中等减少，这表明虽然耀斑可能对生命有害，但由于恒星耀斑的行为而导致的大气变化，以减少下一个恒星烈性烈球的影响。
Stellar flares present challenges to the potential habitability of terrestrial planets orbiting M dwarf stars through inducing changes in the atmospheric composition and irradiating the planet's surface in large amounts of ultraviolet light. To examine their impact, we have coupled a general circulation model with a photochemical kinetics scheme to examine the response and changes of an Earth-like atmosphere to stellar flares and coronal mass ejections. We find that stellar flares increase the amount of ozone in the atmosphere by a factor of 20 compared to a quiescent star. We find that coronal mass ejections abiotically generate significant levels of potential bio-signatures such as N$_2$O. The changes in atmospheric composition cause a moderate decrease in the amount of ultraviolet light that reaches the planets surface, suggesting that while flares are potentially harmful to life, the changes in the atmosphere due to a stellar flare act to reduce the impact of the next stellar flare.
