迁移尘埃的侧位排列——偏心行星引起的新月特征

M. Sommer, P. Pokorný, H. Yano, R. Srama
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引用次数: 0

摘要

从最年轻恒星周围的富含气体的盘到进化的碎片盘,如太阳系的黄道带云,星周盘以各种各样的形式存在。通过引力相互作用,嵌在这些圆盘中的系外行星可以产生密度变化,在圆盘上施加潜在的可观察到的结构特征,如环或间隙。在这里,我们报告了一个镜像双新月模式,出现在模拟盘窝藏一个小的,中等偏心的行星-如火星。我们表明,这种结构是在波印廷-罗伯逊阻力下迁移行星轨道区域的粒子中发生的定向侧向进动的结果。我们进一步分析了这种效应在行星和粒子参数方面的强度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Apsidal alignment in migrating dust - Crescent features caused by eccentric planets
Abstract Circumstellar discs are known to exist in great variety, from gas-rich discs around the youngest stars to evolved debris discs such as the solar system’s zodiacal cloud. Through gravitational interaction, exoplanets embedded in these discs can generate density variations, imposing potentially observable structural features on the disc such as rings or gaps. Here we report on a mirrored double crescent pattern arising in simulations of discs harbouring a small, moderately eccentric planet - such as Mars. We show that the structure is a result of a directed apsidal precession occurring in particles that migrate the planet’s orbital region under Poynting-Robertson drag. We further analyze the strength of this effect with respect to planet and particle parameters.
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