论文标题
巨型行星，小星星：用偏心的kozai-lidov机制在白色矮人周围产生短期行星
Giant Planets, Tiny Stars: Producing Short-Period Planets around White Dwarfs with the Eccentric Kozai-Lidov Mechanism
论文作者
论文摘要
WD J091405.30+191412.25（WD J0914）的最新发现，白色矮人可能会从冰上大行星中吸收的材料，WD 1856+534 B（WD 1856 B），木星大小的行星过渡了白色矮人，是白色矮人，是白色的直接证据，是白色的直接证据，或者是第一个指示。但是，对于这两个系统，观察结果表明，在红色巨型阶段，行星的当前轨道距离将使它们进入恒星信封内，这意味着行星必须在其宿主恒星变成白色矮人之后迁移到当前的轨道上。此外，WD J0914是一个非常热的白色矮人，冷却时间很短，表明快速迁移机制。在这里，我们证明了偏心的kozai-lidov（EKL）机制，结合出色的进化和潮汐效应，可以自然产生观察到的轨道构型，假设白矮人具有较远的恒星伴侣。确实，WD 1856是恒星三重系统的一部分，是恒星二元的遥远伴侣。我们为WD J0914的潜在恒星伴侣的轨道和物理特性提供了约束，并确定了WD 1856系统的初始轨道参数。
The recent discoveries of WD J091405.30+191412.25 (WD J0914 hereafter), a white dwarf likely accreting material from an ice giant planet, and WD 1856+534 b (WD 1856 b hereafter), a Jupiter-sized planet transiting a white dwarf, are the first direct evidence of giant planets orbiting white dwarfs. However, for both systems the observations indicate that the planets' current orbital distances would have put them inside the stellar envelope during the red giant phase, implying that the planets must have migrated to their current orbits after their host stars became white dwarfs. Furthermore, WD J0914 is a very hot white dwarf with a short cooling time that indicates a fast migration mechanism. Here, we demonstrate that the Eccentric Kozai-Lidov (EKL) Mechanism, combined with stellar evolution and tidal effects, can naturally produce the observed orbital configurations, assuming that the white dwarfs have distant stellar companions. Indeed, WD 1856 is part of a stellar triple system, being a distant companion to a stellar binary. We provide constraints for the orbital and physical characteristics for the potential stellar companion of WD J0914 and determine the initial orbital parameters of the WD 1856 system.
