论文标题
新发现的QCS簇的全面光度和运动学特征与Gaia Edr3
A comprehensive photometric and kinematical characteristic of the newly discovered QCs clusters with Gaia EDR3
论文作者
论文摘要
这项研究报告了四个新发现的开放式簇的第一个全面的星体，光度法和运动学分析。即QC1，QC2，QC3和QC4，使用来自G <17 mag的最新GAIA EDR3的星体和光度数据。利用ASTECA代码，我们确定了最可能的（p> = 50％）候选者，并发现明星成员（n）的数量为118（qc1），142（qc2），210（qc3）和110（qc4）。通过将King的密度曲线拟合到群集的RDP中，我们发现了每个群集的内部结构参数，例如在7.00至11.00arcmin范围内的群集半径。对于每个群集，我们构建了CMD，并通过合适的同句将其拟合，我们发现金属度范围为（0.0152-0.0199），它与太阳值，对数年龄（YRS）范围在6.987和8.858之间。 CMD得出的距离为1674 +/- 41、1927 +/- 44、1889 +/- 43和1611 +/- 40（PC），分别为QC1，QC2，QC3和QC4，并且它们与从Astrometric数据中获得的值良好一致，高达85％。此外，从簇的MLR中，我们以158、177、232和182的太阳能单位获得了总质量，M_C，以及4.33、3.80、4.25和4.10的绝对幅度毫克（MAG）分别为4.33、3.80、4.25和4.10。群集成员的动态分析和演变参数表明，所有四个簇都动态放松； QC1除了具有演进参数tau = 0.82的QC1，这表明群集中有动态活动。根据群集数据的运动学分析，我们使用AD-DIAGRAGR方法计算了空间速度，顶点（a，d）的坐标以及太阳元素（s_sun，l_a，l_a，b_a，b_a，alpha_a，alpha_a，delta_a）
This study reports the first comprehensive astrometric, photometric and kinematical analysis of four newly discovered open clusters; namely QC1, QC2, QC3, and QC4, using astrometric and photometric data from the most recent Gaia EDR3 for G<17 mag. Utilizing the ASteCA code, we identified the most probable (P>=50%) star candidates and found the numbers of star members (N) to be 118 (QC1), 142(QC2), 210 (QC3), and 110 (QC4). By fitting King's density profile to the cluster's RDPs, we found the internal structural parameters of each cluster such as the cluster radii that are in the range 7.00 to 11.00arcmin. For each cluster we constructed the CMD and by fitting them with suitable isochrones we found that the metallicity range is (0.0152-0.0199) which is in line with the Solar value, the logarithmic age (in yrs) range between 6.987 and 8.858. The distances derived from CMD are 1674+/-41, 1927+/-44, 1889+/-43,and 1611+/-40 (pc) for QC1, QC2, QC3, and QC4, respectively, and they are in good agreement up to 85% with the values obtained from the astrometric data. In addition, from the MLR of the clusters, we obtained a total mass, M_C in Solar units, of 158, 177, 232, and 182 and an absolute magnitude MG(mag)of 4.33, 3.80, 4.25, and 4.10 for QC1, QC2, QC3, and QC4, respectively. The dynamical analysis and evolution parameters of the cluster members indicated that all the four clusters are dynamically relaxed;except QC1 which has an evolution parameter tau=0.82 that indicates a dynamical activity within the cluster. From the kinematical analysis of the cluster data, we computed the space velocity, the coordinates of the apex point (A,D) using the AD-diagram method, as well as the Solar elements (S_sun, l_A, b_A,alpha_A,delta_A)
