论文标题
遥远的太阳系中的轨道进动;通过数值模拟进一步限制行星九个假设
Orbital precession in the distant solar system; further constraining the Planet Nine hypothesis with numerical simulations
论文作者
论文摘要
太阳系左右的十几个左右远程检测到的对象的纵向和轨道极的纵向以与随机分布的轨道的随机样品不一致的方式聚集。尽管少量数量的统计数据和观察性偏见可以解释这些特征,但聚类的统计意义导致了“行星九个假设”的最新发展。在拟议的情况下,遥远的太阳系中的轨道是通过从未发现的怪异轨道上未发现的巨大行星的世俗扰动来牧养的。然而,外部柯伊氏带和内部乌尔云中的骨螺旋体和节点也受到巨型行星,经过的恒星和银河系潮汐的影响。我们执行了一系列数值模拟套件,旨在研究极端跨核对象(ETNOS)和内部Oort云对象(IOCOS)的轨道比对。在包括九个行星在内的各种融合中,我们一致发现,在4 Gyr后可检测到的ECOCS和IOCO的> 60%的ECTH和IOCO在Perihelia中也与遥远的巨大巨型抗衡器进行了抗对齐。但是,当我们从该剩余轨道样本中随机选择17个对象时,可能会观察到的近乎围巾和轨道杆聚集的经度程度显着散射。此外,我们认为,在缺乏第9行的情况下,即使基础分布均匀,也应表现出17个随机绘制的轨道。因此,我们发现需要更多的ETNO和IOCO检测来自信地推断出九个行星的存在。
The longitudes of perihelia and orbital poles of the solar system's dozen or so most remote detected objects are clustered in a manner inconsistent with that of a random sample of uniformly distributed orbits. While small number statistics and observational biases may explain these features, the statistical significance of the clustering has led to the recent development of the "Planet Nine hypothesis." In the proposed scenario, orbits in the distant solar system are shepherded via secular perturbations from an undetected massive planet on an eccentric orbit. However, the precession of perihelia and nodes in the outer Kuiper Belt and inner Oort Cloud are also affected by the the giant planets, passing stars, and the galactic tide. We perform a large suite of numerical simulations designed to study the orbital alignment of Extreme Trans-Neptunian Objects (ETNOs) and Inner Oort Cloud Objects (IOCOs). In our various integrations that include Planet Nine, we consistently find that >60% of ETNOs and IOCOs that are detectable after 4 Gyr are also anti-aligned in perihelia with the distant massive perturber. However, when we randomly select 17 objects from this sample of remaining orbits, there is significant scatter in the degree of longitude of perihelion and orbital pole clustering that might be observed. Furthermore, we argue that, in the absence of Planet Nine, 17 randomly drawn orbits should still exhibit some clustering even if the underlying distribution is uniform. Thus, we find that still more ETNO and IOCO detections are required to confidently infer the presence of Planet Nine.