标题： 行星盘演化与科兹艾-利多夫行星的形成 显示英文标题

标题： Planet-disc evolution and the formation of Kozai-Lidov planets

摘要： 通过流体动力学模拟，我们确定了当一个最初共面的行星-盘系统围绕一个轨道与之不一致的双星系统中的成员恒星运行时，在盘消散后形成能够经历科扎伊-利多夫（KL）振荡的行星的条件。这些振荡可能解释了一些系外行星观察到的大轨道偏心率以及相对于中心恒星自转轴的大倾角。假设行星足够大以在盘中打开一个缝隙。行星相对于双星轨道平面的倾斜度受到两种类型的振荡影响。第一种类型在相对于双星轨道平面的较小倾角下也存在，这是由于行星与盘和双星伴星的相互作用，并由长期共振增强。第二种类型的振荡是KL振荡，在双星倾角较大时，它同时作用于行星和盘。我们发现，对于足够质量的盘，即使是一个相对低倾角的行星-盘系统，也会由于第一种倾斜振荡而使行星的倾角超过临界的KL角度，从而使其能够经历第二种振荡。我们得出结论，双星系统中足够质量和倾角的盘的流体动力学演化扩大了形成偏心且倾斜的巨行星系统的范围，包括广泛的初始倾角范围（20至160度）。 显示英文摘要

摘要： With hydrodynamical simulations we determine the conditions under which an initially coplanar planet-disc system that orbits a member of a misaligned binary star evolves to form a planet that undergoes Kozai-Lidov (KL) oscillations once the disc disperses. These oscillations may explain the large orbital eccentricities, as well as the large misalignments with respect to the spin of the central star, observed for some exoplanets. The planet is assumed to be massive enough to open a gap in the disc. The planet's tilt relative to the binary orbital plane is subject to two types of oscillations. The first type, present at even small inclination angles relative to the binary orbital plane, is due to the interaction of the planet with the disc and binary companion and is amplified by a secular resonance. The second type of oscillation is the KL oscillation that operates on both the planet and disc at larger binary inclination angles. We find that for a sufficiently massive disc, even a relatively low inclination planet-disc system can force a planet to an inclination above the critical KL angle, as a consequence of the first type of tilt oscillation, allowing it to undergo the second type of oscillation. We conclude that the hydrodynamical evolution of a sufficiently massive and inclined disc in a binary system broadens the range of systems that form eccentric and misaligned giant planets to include a wide range of initial misalignment angles (20 to 160 degrees).