DBSCAN Clustering Algorithm for the Detection of Nearby Open Clusters Based on Gaia-DR2two |
| |
Authors: | Xu Shou-kun Wang Chao Zhuang Li-hua Gao Xin-hua |
| |
Institution: | School of Information Science and Engineering, Changzhou University, Changzhou 213164 |
| |
Abstract: | In this paper, we attempt to use the DBSCAN (Density-Based Spatial Clustering of Applications with Noise) clustering algorithm to detect nearby open clusters based on the Gaia Data Release 2 (Gaia-DR2). We select 594284 stars (within a distance of 100 pc to the Sun) from the Gaia-DR2 catalog, and construct a five-dimensional phase space (three-dimensional spatial position and two-dimensional proper motion) in order to obtain reliable cluster members. At the data preprocessing stage, we normalize each dimension of data to the 0, 1] interval in order to avoid the effect of inconsistent units. Then, we use the k-dist graphs to determine the input parameters of the DBSCAN Algorithm. Finally, we obtain 133 reliable members using the DBSCAN algorithm, which correspond to two open clusters—Hyades and Coma. According to these cluster members, the distances to the Hyades and Coma clusters are determined to be (6.5 ± 0.3) pc and (4.9 ± 0.4) pc, respectively. |
| |
Keywords: | Corresponding author Open clusters and associations: Individual Hyades Coma parallaxes stars methods: data analysis |
本文献已被 ScienceDirect 等数据库收录! |
|