标题： 基于盖亚DR3目录的银河系年轻疏散星团的运动学和结构研究 显示英文标题

标题： A kinematic and structural study of young open clusters in the Milky Way Galaxy using Gaia DR3 catalogue

摘要： 我们旨在识别星团成员，估计星团属性，研究星团随质量变化的动力学状态，追踪大质量恒星中动力学效应的存在，并检查年轻星团中成员的空间模式。 我们使用Gaia DR3的数据研究了14个位于1 kpc以内的年轻开放星团，成员星的识别使用了GMM方法。 通过将PARSEC等时线拟合到CMDs上，估计了星团参数，如年龄、距离、金属量和消光。 这些星团的年龄在6-90 Myr之间，距离在334-910 pc之间，质量范围为0.13至13.77倍太阳质量。 在这五个星团中，F到M型恒星显示出增加的速度弥散，这是动力学松弛的标志。 我们检测到B和A型恒星的高自行速度，可能是在其他五个星团中的逃逸恒星，Alessi Teutsch 5, ASCC 16, ASCC 21, IC 2395和NGC 6405。 我们证明了年轻星团中存在依赖于质量的速度弥散，这表明有动力学松弛。 发现年轻星团的横向速度弥散范围通常为0.40 - 0.70 km/s。 显示英文摘要

摘要： We aim to identify the cluster members, estimate cluster properties, study the dynamical state of the clusters as a function of mass, trace the existence of dynamical effects in massive stars, and check for spatial patterns of members in young clusters. We studied 14 young open clusters located within 1 kpc using the data from Gaia DR3 with the membership estimated using the GMM method. The cluster parameters such as age, distance, metallicity, and extinction were estimated by fitting PARSEC isochrones to the CMDs. These clusters are found to have ages between 6-90 Myr, located between 334-910 pc, covering a mass range, of 0.13 to 13.77 solar mass. In five of these clusters, stars from F to M spectral type show increasing velocity dispersion, a signature for dynamical relaxation. We detect high proper motion for B and A-type stars, possible walkaway stars in the other five clusters, Alessi Teutsch 5, ASCC 16, ASCC 21, IC 2395, and NGC 6405. We demonstrate the existence of mass-dependent velocity dispersion in young clusters suggestive of dynamical relaxation. The typical range of transverse velocity dispersion is found to be 0.40 - 0.70 km/s for young clusters.