论文标题
在耀斑的影响下，Trappist-1行星的表面和海洋可居住性
Surface and oceanic habitability of Trappist-1 planets under the impact of flares
论文作者
论文摘要
在Ultracool Dwarf Star Trappist-1周围发现潜在的可居住的行星自然提出了一个问题：Trappist-1行星可以成为生命的家园吗？这些行星轨道非常接近宿主恒星，并且最容易受到Trappist-1的强烈和频繁耀斑发出的紫外线辐射。在这里，我们通过K2任务计算在Trappist -1上观察到的超荧光片的紫外光谱（100-450 nm）。我们将辐射转移模型与该光谱相结合，以估算Trappist-1（行星$ e $，$ f $和$ g $）的行星上的紫外线表面通量，假设基于益生元和氧气大气的大气场景。我们量化了紫外线辐射对生物体对表面和假设行星海洋的影响。最后，我们发现对于非氧化行星，抗紫外线的生命形式将在行星F和G的表面生存。然而，可以保护更脆弱的生物（即\ textit {e。coli}）免受大于8M的海洋深度的危险紫外线效应。如果行星有臭氧层，那么这里研究的任何生命形式都将在HZ行星中生存。
The discovery of potentially habitable planets around the ultracool dwarf star Trappist-1 naturally poses the question: could Trappist-1 planets be home to life? These planets orbit very close to the host star and are most susceptible to the UV radiation emitted by the intense and frequent flares of Trappist-1. Here we calculate the UV spectra (100 - 450 nm) of a superflare observed on Trappist-1 with the K2 mission. We couple radiative transfer models to this spectra to estimate the UV surface flux on planets in the habitable zone of Trappist-1 (planets $e$, $f$, and $g$), assuming atmospheric scenarios based on a pre-biotic and an oxygenic atmosphere. We quantify the impact of the UV radiation on living organisms on the surface and on a hypothetical planet ocean. Finally, we find that for non-oxygenic planets, UV resistant lifeforms would survive on the surface of planets f and g. Nevertheless, more fragile organisms (i.e. \textit{E. coli}) could be protected from the hazardous UV effects at ocean depths greater than 8m. If the planets have an ozone layer, any lifeforms studied here would survive in the HZ planets.
