一颗具有高轨道倾角的极端海外天体的发现与动力学分析
地球与行星天体物理
2018-08-07 v2
摘要
我们报告了2015 BP的发现与动力学分析,这是一个由暗能量巡天(Dark Energy Survey)在日心距55 AU、绝对星等Hr=4.3处探测到的极端海外天体(Trans-Neptunian Object, TNO)。由1110天观测弧确定的当前轨道具有半长轴450 AU、偏心率0.92和倾角54度。鉴于这些轨道要素,2015 BP是迄今发现的最极端TNO,这由约化Kozai作用量量化,该量在轴对称扰动下对固定半长轴为守恒量。我们在已知太阳系的背景下讨论该天体的轨道稳定性与演化,发现2015 BP展现出丰富的动力学行为,包括半长轴的快速扩散以及偏心率和倾角更受约束的变化。我们还考虑了在第九行星假说(Planet Nine Hypothesis)框架内的长期轨道稳定性与演化行为,发现BP增添了这一假想太阳系新成员存在的间接证据,因为它将代表高倾角、受 Shepherd(牧羊)作用的TNO群体的首个成员。
引用
@article{arxiv.1805.05355,
title = {Discovery and Dynamical Analysis of an Extreme Trans-Neptunian Object with a High Orbital Inclination},
author = {J. C. Becker and T. Khain and S. J. Hamilton and F. Adams and D. W. Gerdes and L. Zullo and K. Franson and S. Millholland and G. M. Bernstein and M. Sako and P. Bernardinelli and K. Napier and L. Markwardt and Hsing Wen Lin and W. Wester and F. B. Abdalla and S. Allam and J. Annis and S. Avila and E. Bertin and D. Brooks and A. Carnero Rosell and M. Carrasco Kind and J. Carretero and C. E. Cunha and C. B. D'Andrea and L. N. da Costa and C. Davis and J. De Vicente and H. T. Diehl and P. Doel and T. F. Eifler and B. Flaugher and P. Fosalba and J. Frieman and J. Garcia-Bellido and E. Gaztanaga and D. Gruen and R. A. Gruendl and J. Gschwend and G. Gutierrez and W. G. Hartley and D. L. Hollowood and K. Honscheid and D. J. James and K. Kuehn and N. Kuropatkin and M. A. G. Maia and M. March and J. L. Marshall and F. Menanteau and R. Miquel and R. L. C. Ogando and A. A. Plazas and E. Sanchez and V. Scarpine and R. Schindler and I. Sevilla-Noarbe and M. Smith and R. C. Smith and M. Soares-Santos and F. Sobreira and E. Suchyta and M. E. C. Swanson and A. R. Walker},
journal= {arXiv preprint arXiv:1805.05355},
year = {2018}
}
备注
published in AJ; observations available on MPC