评估潮汐锁定岩质系外行星的气候与宜居性

本文评估了具有高地球相似指数的潮汐锁定系外行星的液态水宜居性。研究通过改进气候模型 PLASIM，识别出雪球、炎热和眼球行星三种主要气候模式，并指出眼球行星在广泛的大气压范围内保持气候稳定。这些发现强调了详细气候模拟对于指导未来观测的重要性。

arXiv:2608.25451v1 Announce Type: new Abstract: Tidally locked exoplanets orbiting M dwarf stars are prime targets in the search for habitable worlds, yet their complex climate dynamics challenge conventional models of habitability. We homogeneously estimated the liquid-water habitability of exoplanets with the highest up-to-date Earth-similarity index. We modified the climate model PLASIM to apply it to tidally locked exoplanets across a range of parameters. We systematically classified and compared potentially habitable exoplanets and selected among the ones featuring the highest Earth-similarity index in the conservative sample of the Habitable Wolds Catalog, both relative to each other and as a function of atmospheric pressure. Our analysis revealed three main climate regimes: Snowball, Hot, and Eyeball planets-the latter having a warm and habitable substellar region with T > 273 K and a localized hydrological cycle. Although surface temperature generally increases with pressure, Eyeball planet climates remain stable in a wide pressure range. Complex atmospheric dynamics govern the behavior of the climate, highlighting the need for detailed climate simulations to guide future observations.