摘要
We report the discovery of four new open clusters(named QC 1,QC 2,QC 3 and QC 4)in the direction of Cygnus Cloud and select their members based on five astrometric parameters(l,b,ω,μα*,μδ)of Gaia DR2.We also derive their astrophysical parameters for each new cluster.Structure parameters are generated by fitting the radial density distribution with a King’s profile.Using solar metallicity,we performed isochrone-fitting on their purified color-magnitude diagrams(CMDs)to derive the age of the clusters.The known cluster NGC 7062 in an adjacent area is chosen to verify our identification process.The estimated distance,reddening and age of NGC 7062 are in good agreement with the literature.
作者
Song-Mei Qin
Jing Li
Li Chen
Jing Zhong
秦松梅;李静;陈力;钟靖(Physics and Space Science College,China West Normal University,Nanchong 637000,China;Key Laboratory for Research in Galaxies and Cosmology,Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China;Chinese Academy of Sciences South America Center for Astronomy,Beijing 100101,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China)
基金
supported by the National Natural Science Foundation of China(NSFC)under Grant No.11703019
China West Normal University Grants 17C053,17YC507 and 16E018
support from NSFC under Grant No.11661161016
the NSFC under Grant No.U1731129。
