论文标题
通过在Gaia Dr2中的数据手动挖掘发现的新开放群集
New Open Clusters Found by Manual Mining of Data in Gaia DR2
论文作者
论文摘要
一系列20个新的开放群集的物理性质已被确认使用了针对推定的明星成员的现有数据，主要来自第二Gaia数据发布（DR2）。通过目视检查摄影DSS板或随机源场的正确运动图，发现了簇作为恒星过度的恒星。报告的物体不存在于最全面或最新的恒星簇和关联目录中。对于所有这些，在适当的运动空间中揭示了一团共同的星星。结块恒星的视差与狭窄距离范围内的开放簇的真实存在兼容。表面密度计算，没有与非成员来源的大多数噪声，在某些情况下可以区分簇芯和扩展的集群电晕。颜色标记图通常显示出明确的主序列，该序列允许确认簇的物理存在及其某些特征。两个新簇似乎形成了具有共同起源的双重系统。几个新群集挑战了距离距离在1.0到1.8 kpc的距离近乎完整性的主张（Kharchenko etal。2013）。
The physical nature of a series of 20 new open clusters is confirmed employing existing data on putative star members, mainly from second Gaia Data Release (DR2). The clusters were discovered as overdensities of stars by visual inspection of either photographic DSS plates or proper motion plots of random source fields. The reported objects are not present in the most comprehensive or recent catalogs of stellar clusters and associations. For all of them, clumps of comoving stars are revealed in the proper motion space. The parallaxes of the clumped stars are compatible with the real existence of open clusters over narrow ranges of distances. Surface density calculations, free of most noise from non-member sources, allow in some cases differentiating a cluster core and an extended cluster corona. Color-magnitude diagrams generally show a definite main sequence that allows the confirmation of the physical existence of the clusters and some of their characteristics. Two of the new clusters seem to form a double system with a common origin. Several of the new clusters challenge the claim of near completeness of the known OC population in the distance range from 1.0 to 1.8 kpc of the Sun (Kharchenko et al. 2013).
