标题： 搜索夜空中年轻的逃亡者 显示英文标题

标题： Searching for young runaways across the sky

摘要： 我们提出了一个包含 3354 颗候选年轻星的目录，这些恒星似乎以 >5 公里/秒的相对速度从它们的母协会中被抛射出来，且距离地球不超过 500 秒差距。 这些候选者通过均匀选择的方式确定，即对先前识别出的前主序候选体执行 2D 球面回溯分析，将其追溯到不同的恒星形成区，确保回溯年龄与恒星的估计年龄与所属群体的年龄一致，并排除来自附近移动星群的污染，这些移动星群遵循场中的主导速度流。 在识别出的候选者中，我们发现了一些成对的恒星，它们似乎在抛射过程中发生过相互作用。这些成对的恒星具有相似的回溯时间，它们的轨迹看起来彼此相反，或者在过程中形成了宽间距双星。 由于这些候选者的筛选仅限于二维空间，因此需要光谱后续观测来最终确认它们的身份。 遗憾的是，最近发布的盖亚 DR3 径向速度数据似乎不适合描述年龄小于 1 亿年的低质量恒星的动力学特性，因为它们的吸积、活动以及许多其他使其区别于更演化的恒星的光谱特征似乎并未在数据中得到准确反映，这导致它们径向速度分布中存在显著的人为膨胀散射。 显示英文摘要

摘要： We present a catalog of 3354 candidate young stars within 500 pc that appear to have been ejected from their parent associations with relative speeds of >5 km/s. These candidates have been homogeneously selected through performing a 2d spherical traceback of previously identified pre-main sequence candidates to various star forming regions, ensuring that the traceback age as well as the estimated age of a star is consistent with the age of the population, and excluding contaminants from the nearby moving groups that follow the dominant velocity currents in the field. Among the identified candidates we identify a number of pairs that appear to have interacted in the process of the ejection, these pairs have similar traceback time, and their trajectory appears to be diametrically opposite from each other, or they have formed a wide binary in the process. As the selection of these candidates is performed solely in 2d, spectral follow-up is necessary for their eventual confirmation. Unfortunately, recently released Gaia DR3 radial velocities appear to be unsuitable for characterizing the kinematics of low mass stars with ages <100 Myr, as the accretion, activity, and a variety of other spectral features that make them distinct from the more evolved stars do not appear to have been accurately accounted for in the data, resulting in significant artificially inflated scatter in their RV distribution.