论文标题
巨型行星对原始散射磁盘的集体重力的影响
Giant Planet Influence on the Collective Gravity of a Primordial Scattered Disk
论文作者
论文摘要
高偏心率的轴对称磁盘，近二元轨道上的低质量物体对于平面外屈曲不稳定。这种“倾向不稳定性”成倍地增长了轨道倾斜度，在围场论证中提高了围侧距离和簇。在这里，我们检查了一个巨大的原始散射盘的不稳定性，包括巨型行星的轨道平均重力影响。我们表明，除非原始质量为$ \ gtrsim 20 $地球质量，否则由巨型行星引起的差分尖体进度将抑制倾斜度的不稳定性。我们还表明，不稳定性应在数百个AU的半轴轴上产生“围栏间隙”，因为残留人口的轨道更有可能具有极大的围栏距离（$ \ Mathcal {o}（O}（100〜 \ rm {au}）$）。
Axisymmetric disks of high eccentricity, low mass bodies on near-Keplerian orbits are unstable to an out-of-plane buckling. This "inclination instability" exponentially grows the orbital inclinations, raises perihelia distances and clusters in argument of perihelion. Here we examine the instability in a massive primordial scattered disk including the orbit-averaged gravitational influence of the giant planets. We show that differential apsidal precession induced by the giant planets will suppress the inclination instability unless the primordial mass is $\gtrsim 20$ Earth masses. We also show that the instability should produce a "perihelion gap" at semi-major axes of hundreds of AU, as the orbits of the remnant population are more likely to have extremely large perihelion distances ($\mathcal{O}(100~\rm{AU})$) than intermediate values.
