通过平衡潮和动力学潮迁移的超级偏心热木星案例研究
Case Study of a Super-eccentric Warm Jupiter Migrating via Equilibrium and Dynamical Tides
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中文总结 AI 辅助
以TIC 241249530 b为案例，研究热木星高偏心率迁移，测试平衡潮和混沌动力学潮模型，发现只有平衡潮能解释其特性, 混沌动力学潮因要求行星更靠近恒星而无法解释该系统。
中文摘要 AI 辅助
热木星形成的一个主要理论是高偏心率迁移，即行星在大间距处诞生并被激发到接近1的偏心率，产生极端潮汐耗散使轨道收缩并圆化。最直接证据是探测到正在迁移的高偏心率行星。近期发现的TIC 241249530 b是超级偏心（e = 0.94）且逆行的热木星前身，是探索高偏心率迁移及相关潮汐物理的理想案例。本文研究其迁移历史并测试平衡潮和混沌动力学潮两种潮汐耗散模型。结果表明，只有主导潮汐耗散为平衡潮形式时，其特性才能通过系统中观测到的遥远双星引发的冯·齐佩尔-利多维- Kozai振荡触发的高偏心率迁移来解释，混沌动力学潮无法解释该系统，因其要求行星迁移到更靠近恒星的位置。
英文摘要
A leading theory for hot Jupiter formation is high-eccentricity migration, in which planets are born at large separations and excited to near-unity eccentricities, creating extreme tidal dissipation that shrinks and circularizes their orbits. The most direct evidence for this scenario is the detection of highly eccentric planets caught in the act of migrating. Although such planets are rare, the recent discovery of TIC 241249530 b - a super-eccentric ($e = 0.94$) and retrograde hot Jupiter progenitor - presents an ideal case study to explore high-eccentricity migration and the accompanying tidal physics. In this paper, we examine the migration history of TIC 241249530 b and test two different models of tidal dissipation: equilibrium tides and chaotic dynamical tides. We show that TIC 241249530 b's properties can be explained by high-eccentricity migration triggered by von Zeipel-Lidov-Kozai oscillations induced by the observed distant binary star in the system, but only if the dominant tidal dissipation takes the form of equilibrium tides. Chaotic dynamical tides fail to explain the system because they require the planet to have migrated substantially closer to its star.
