摘要
利用绝对自行资料,确定了年轻疏散星团NGC 2244天区恒星的运动学成员概率,并对星团成员概率以及自行矢量的分布、不同成员概率恒星的位置分布情况、径向数密度轮廓等进行了讨论并给出了星团的特征尺度;进一步结合已知的星团距离和视向速度资料,计算了NGC 2244的三维空间运动速度,结果表明NGC 2244是一个典型的薄盘族星团。
Based on the absolute proper motion data, membership probabilities of stars in the region of very young open cluster NGC 2244 are determined. Based on the membership results, some spatial and kinematical properties of the cluster were discussed and the projected radius of NGC 2244 is obtained. Combined with the mean radial velocity and distance of the cluster, from the literature, the 3-D spatial velocity of NGC 2244 is also derived.
出处
《中国科学院上海天文台年刊》
2006年第1期54-60,共7页
Annals Shanghai Astronomical Observatory Chinese Academy of Sciences
基金
国家自然科学基金(No.10373020
No.10333050)上海市科研计划(04ZR14153)项目资助。
关键词
疏散星团
NGC
2244
成员概率
空间速度
Open cluster -- NGC 2244 -- membership determination -- spatial velocity
