Col-OSSOS：从原行星盘继承的成分梯度的证据？
Col-OSSOS: Evidence for a compositional gradient inherited from the protoplanetary disk?
摘要：
在现今的柯伊伯带中，成分类别的数量和这些类别的轨道分布对太阳系具有重要的宇宙起源意义。在Fraser等人的一篇配套论文中，我们证明了小（H>6）海王星外天体（TNOs）的观测到的颜色分布可以用两种成分类别的存在来解释，这两种成分类别被命名为亮红外和暗红外，其中每种类别中的颜色范围由两种材料端元的混合物决定。在这里，我们调查的轨道分布的两个颜色类确定的Fraser等人。并发现轨道倾角的brightIR类对象与它们的光学颜色。使用数值模拟的输出调查TNO的轨道演化在其散射阶段与海王星，我们表明，这种相关性可以反映在早期的原行星盘的成分梯度，在日心距离的范围内，TNO从brightIR类吸积。然而，这种解释和冷经典TNO之间的蓝色污染物的存在，以及可能的替代来源检测到的相关性之间的紧张关系，目前承担我们提出的解释的不确定性。
英文摘要：
In the present-day Kuiper Belt, the number of compositional classes and the orbital distributions of these classes hold important cosmogonic implications for the Solar System. In a companion paper by Fraser et al., we demonstrate that the observed color distribution of small (H>6) Trans-Neptunian Objects (TNOs) can be accounted for by the existence of only two composition classes, named brightIR and faintIR, where the range of colors in each class is governed by a mixture of two material end members. Here, we investigate the orbital distribution of the two color classes identified by Fraser et al. and find that the orbital inclinations of the brightIR class objects are correlated with their optical colors. Using the output of numerical simulations investigating the orbital evolution of TNOs during their scattering phase with Neptune, we show that this correlation could reflect a composition gradient in the early protoplanetary disk, in the range of heliocentric distances over which TNOs from the brightIR class accreted. However, tensions between this interpretation and the existence of blue contaminants among cold classical TNOs, and possible alternative origins for the detected correlation, currently bear uncertainty on our proposed interpretation.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
