论文标题
与Gaia DR2的附近年轻移动组的会员概率分析
Analysis of membership probability in nearby young moving groups with Gaia DR2
论文作者
论文摘要
我们通过$ \ textit {gaia} $ dr2数据分析了属于附近移动组的年轻明星的成员资格概率。从“可疑附近的年轻运动组恒星的目录”中鉴定出1429颗恒星的样品。从$ \ textit {gaia} $ dr2数据库中检索了890星的优质视差和正确的运动值。成员资格概率的分析是在蕾丝算法的框架中进行的。从分析中可以证实，279颗恒星不属于任何已知的移动组。我们估计了250个移动组成员的$ \ textIt {u，v，w} $ space速度值，这比文献中列出的先前值更准确。所有移动组的速度椭圆都受到了“好盒子”的限制，这是一个广泛使用的标准，用于识别移动组成员。从$ \ textit {gaia} $ color-magnitude图表的分析中，均匀估计了移动组成员的年龄。我们发现属于某些移动群体的恒星的年龄分布蔓延，这需要从进一步的研究中理解。
We analyze the membership probability of young stars belonging to nearby moving groups with $\textit{Gaia}$ DR2 data. The sample of 1429 stars were identified from 'The Catalog of Suspected Nearby Young Moving Group Stars'. Good-quality parallax and proper motion values were retrieved for 890 stars from $\textit{Gaia}$ DR2 database. The analysis for membership probability is performed in the framework of LACEwING algorithm. From the analysis it is confirmed that 279 stars do not belong to any of the known moving groups. We estimated the $\textit{ U, V, W}$ space velocity values for 250 moving group members, which were found to be more accurate than previous values listed in the literature. The velocity ellipses of all the moving groups are well constrained within the "good box", a widely used criterion to identify moving group members. The age of moving group members are uniformly estimated from the analysis of $\textit{Gaia}$ Color-Magnitude Diagram with MIST isochrones. We found a spread in the age distribution of stars belonging to some moving groups, which needs to be understood from further studies.
