论文标题
基于盖亚的开放群集伯克利分析27
A Gaia based analysis of open cluster Berkeley 27
论文作者
论文摘要
在本文中，我们已经使用Gaia的数据Release-3（DR3）数据来研究中级开放式伯克利27（BE 27）。基于会员概率（$> 80 \％$），总共选择了131个最可能的群集成员。簇的半径估计为3.74 arcmin。确定为27的平均运动（PM）为（$μ_αcosδ$，$μ_δ$）=（$ -1.076 \ pm0.008 $，$ 0.152 \ pm0.007 $）〜mas〜mas〜yr $^yr $^{ - 1} $。群集的蓝色Straggler星（BS）位于中央区域。比较了金属性的理论等音等异形，将颜色数字图（cmd）与27的颜色图（CMD）进行了比较。结果，以地为中心的4.8 $ \ pm $ \ pm $ 0.2 kpc and log（年龄）和日志（年龄）= 9.36 $ \ pm \ pm $ 0.03是27.03的27.03。沿着银河中心周围的圆形路径。簇似乎并没有受到银河系薄磁盘的潮汐力的影响。
In this paper, we have used the Gaia's Data Release-3 (DR3) data to study an intermediate-age open cluster Berkeley 27 (Be 27). A total of 131 most probable cluster members are picked within the cluster's radius based on the membership probability ($> 80\%$). The cluster's radius was estimated as 3.74 arcmin. The mean proper motion (PM) of Be 27 was determined to be ($μ_α cosδ$, $μ_δ$)= ($-1.076\pm0.008$, $0.152\pm0.007$)~mas~yr$^{-1}$. The blue straggler stars (BSS) of the cluster were found to be located in the central region. Theoretical isochrones of metallicity Z$_{metal}$= 0.008 were compared to the color-magnitude diagram (CMD) of Be 27. As a result, a heliocentric distance of 4.8$\pm$0.2 kpc and log (age) = 9.36$\pm$0.03 were determined for Be 27. The Galactic orbits are derived using the Galactic potential model which demonstrate that Be 27 follows a circular path around the Galactic center. The cluster does not seem to be affected much by the tidal forces from the Galactic thin disk.
