通过间歇性共振锁定实现的迁移行星与其脉动恒星的共同演化
The coevolution of migrating planets and their pulsating stars through episodic resonance locking
AI总结：
本研究结合恒星演化与潮汐模型，发现偏心气态巨行星引发的动力学潮汐可形成多模共振锁定链，解释了部分恒星异常强潮汐相互作用与脉动的成因，同时为约束宿主恒星属性提供了新途径。
摘要：
热木星（Hot Jupiters）被认为形成于远离宿主恒星的位置，随后因温和且持续的潮汐耗散，通过平滑单调的轨道衰减向内迁移至近距圆轨道。然而，近期发现的三个系统中存在行星引发的恒星脉动，表明潮汐相互作用强度远超预期。本文结合恒星演化模型与潮汐模型开展研究，结果显示：由偏心气态巨行星引发的动力学潮汐，可产生包含多种模式的共振锁定链，丰富了已圆化系统单模共振锁定所呈现的动力学特征。与单次共振锁定事件或非共振潮汐相互作用的预期结果相比，这一系列共振锁定带来的偏心率变化与谐波脉动幅度高出数个数量级。随着恒星脱离主序星阶段，共振发生频率会进一步升高，这为部分脉动恒星的起源提供了另一种解释，并引出“休眠迁移巨行星（dormant migrating giants）”的概念。系统的演化轨迹以向内/向外迁移、恒星自转加速/减速的交替竞争阶段为特征，且这些过程对系统参数高度敏感，给迁移路径建模、已观测到的系外巨行星与双星恒星种群的背景阐释带来了新的挑战。但这种敏感性也开辟了新的研究窗口，可通过潮汐星震学（tidal asteroseismology）约束行星宿主恒星的属性。
英文摘要：
Hot Jupiters are expected to form far from their host star and move toward close-in, circular orbits via a smooth, monotonic decay due to mild and constant tidal dissipation. Yet, three systems have recently been found exhibiting planet-induced stellar pulsations suggesting unexpectedly strong tidal interactions. Here we combine stellar evolution and tide models to show that dynamical tides raised by eccentric gas giants can give rise to chains of resonance locks with multiple modes, enriching the dynamics seen in single-mode resonance locking of circularized systems. These series of resonance locks yield orders-of-magnitude larger changes in eccentricity and harmonic pulsations relative to those expected from a single episode of resonance locking or nonresonant tidal interactions. Resonances become more frequent as a star evolves off the main sequence providing an alternative explanation to the origin of some stellar pulsators and yielding the concept of "dormant migrating giants". Evolution trajectories are characterized by competing episodes of inward/outward migration and spin-up/-down of the star which are sensitive to the system parameters, revealing a new challenge in modeling migration paths and in contextualizing the observed populations of giant exoplanets and stellar binaries. This sensitivity however offers a new window to constrain the stellar properties of planetary hosts via tidal asteroseismology.
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。
