行星节律：变辐照异步行星上的同步环流
Planetary Rhythms: Synchronous Circulation on Variably Irradiated Asynchronous Planets
AI总结：
研究发现异步旋转行星在昼夜周期与辐照变化共振时，可模拟潮汐锁定行星的环流，形成拍频现象，并据此分类开普勒和TESS环双星行星，指出拍频可能扩展宜居带。
摘要：
行星对其宿主恒星的潮汐锁定导致大气环流中的热点固定在行星的参考系中。另一方面，异步旋转行星则具有移动的热点，这些热点在相应的星下点沿表面平移时滞后或超前于该点。我们表明，属于后一类的行星在时变辐照的影响下（可能由脉动恒星或多恒星系统提供）可以模拟潮汐同步行星的环流。这种情况发生在行星的昼夜周期与辐照变化周期共振时，导致热点固定在行星参考系中。上述周期的微小差异会导致热点以显著长于两者的周期向东-西或西-东方向缓慢移动。热点移动速率由昼夜周期与辐照变化速率之差给出，类似于线性波理论中两列叠加波形成的拍频图案的下包络频率。我们将这种现象称为拍频。辐射、旋转、波传播和拖曳时间尺度的组合对拍频建立了动力学约束。基于此，我们对一组开普勒和TESS环双星行星进行了分类，其中有两个候选者表现出偏离无变化情景的气候差异。一般来说，更热和自转更快的行星更容易出现气候差异。如果发生拍频，还可能为相应系统创造宜居带的乐观扩展。
英文摘要：
Tidal locking of planets to their host stars results in an atmospheric circulation with a hotspot fixed to the frame of reference of the planet. On the other hand, asynchronously rotating planets feature moving hotspots either lagging or leading the corresponding substellar point as it translates along the surface. We show that a planet falling in the latter category could mimic the circulation of tidally synchronous planets under the influence of time-varying instellation, possibly provided by pulsating or multiple star systems. This happens when the planets diurnal period is in resonance with the period of instellation variation, leading to a planet-frame-fixed hotspot. Slight differences in the above periods lead to East-West or West-East creeping hotspots with a period significantly longer than both. The rate of hotspot motion is given by the difference between the diurnal and instellation variation rates, similar to the lower envelope frequency of beat patterns formed by two superposed waves in linear wave theory. We call this phenomenon beating. A combination of the radiative, rotational, wave propagation, and drag timescales establishes dynamical constraints on beating. Based on this we classify a set of Kepler and TESS circumbinary planets with two candidates exhibiting climatic departures from the no-variation scenario. In general, hotter and faster-spinning planets are more susceptible to climatic departures. Beating, if it occurs, may additionally create optimistic extensions of habitable zones for corresponding systems.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
