标题： 基于PSP/WISPR观测到的法厄同尘埃尾迹的双子座流星模型对比 显示英文标题

标题： A Comparison of Geminid Models with the PSP/WISPR-observed Phaethon Dust Trail

摘要： NASA帕克太阳探测器上WISPR仪器拍摄的白光观测最近揭示了，在小行星3200法厄同轨道附近存在一条狭窄而密集的尘埃轨迹。尽管与双子座流星雨有关，但它与法厄同轨道以及已知的双子座流星体轨道并不完全对齐。 为了研究这条尘埃轨迹的本质，我们详细比较了WISPR轨迹观测结果和几个成熟的双子座流星雨模型。在WISPR视场内模拟这些模型表明，WISPR轨迹几乎肯定代表了双子座流星雨流的真正“密度核心”。 模型轨迹宽度和偏离法厄同轨道的趋势，作为真近点角的函数，与观测结果在不同程度上一致。然而，由于Poynting-Robertson效应，所有模型都将它们的假想核心置于母体轨道内部，这与WISPR轨迹位于法厄同轨道外部的情况相矛盾。因此，法厄同当前的轨道可能不代表系统母体的轨道，该母体很可能具有更大的半长轴。 这些发现为未来的双子座流星雨模型提供了新的初始条件，WISPR确定了双子座流星雨核心的位置。 显示英文摘要

摘要： White-light observations from the WISPR instrument on NASA's Parker Solar Probe recently revealed the presence of a narrow, dense dust trail close to the orbit of asteroid 3200 Phaethon. Although Geminid-related, it aligns imperfectly with Phaethon's orbit and known Geminid meteoroid orbits. To address the nature of this dust trail, we performed a detailed comparison between the WISPR trail observations and several well-developed Geminid models. Simulating these models in the WISPR field of view visually demonstrates that the WISPR trail almost certainly represents the true ``density core'' of the Geminid stream. Trends in model trail width and offset from Phaethon's orbit, both as functions of true anomaly, agree with observations to varying extents. All the models, however, place their apparent core interior to the parent orbit due to Poynting-Robertson forces, contradictory to the WISPR trail which is exterior to Phaethon's orbit. Therefore, Phaethon's current orbit likely does not represent the orbit of the system parent, which most probably had a larger semi-major axis. These findings provide new initial conditions for future Geminid models, with WISPR identifying the Geminid core's position.