A catalogue of 74 new open clusters found in Gaia Data-Release 2  

作　　者：Zhi-Hong He Ye Xu Chao-Jie Hao Zhen-Yu Wu Jing-Jing Li 

机构地区：[1]Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023,China [2]University of Science and Technology of China,Hefei 230026,China [3]National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China [4]Key Laboratory of Optical Astronomy,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China

出　　处：《Research in Astronomy and Astrophysics》2021年第4期216-224,共9页天文和天体物理学研究（英文版）

基　　金：funded by the National Natural Science Foundation of China(Grant Nos.11933011,11873019,11673066);by the Key Laboratory for Radio Astronomy。

摘　　要：Based on astrometric data from Gaia Data-Release 2(DR2),we employ an unsupervised machine learning method to blindly search for open star clusters in the Milky Way within the Galactic latitude range of|b|<20°.In addition to 2080 known clusters,74 new open cluster candidates are found.In this work,we present the positions,apparent radii,parallaxes,proper motions and member stars of these candidates.Meanwhile,to obtain the physical parameters of each candidate cluster,stellar isochrones are fit to the photometric data.The results show that the apparent radii and the observed proper motion dispersions of these new candidates are consistent with those of open clusters previously identified in Gaia DR2.

关 键 词：Galaxy:open clusters and associations methods:data analysis surveys 

分 类 号：P15[天文地球—天文学]