Spatial Correlation Analysis of Globular Cluster Member Stars

Subjects: Astronomy submitted time 2024-01-31 Cooperative journals: 《天文学报》

LIN Wei-bin CHEN Nan LIN Si-wei

Abstract： In this study, globular clusters NGC (New General Catalogue) 104, NGC 5139 and NGC 6121 were used as experimental areas, and 10 parameters such as parallax were selected. Then, we propose a geography-based research paradigm to quantitatively describe the spatial distribution characteristics of globular cluster members stars by introducing the spatial analysis theory and corresponding analysis framework in geography. Based on this, we obtain the spatial distribution characteristics of parameters of globular cluster member stars by calculating the global Moran's I index, and obtain the local spatial distribution characteristics of parameters according to Moran scatter diagram and LISA (Local Indicators of Spatial Association) agglomeration map. The research results show that the parameters of the member stars of the globular clusters NGC 104, NGC 5139 and NGC 6121 generally exhibit positive spatial correlation characteristics, show the characteristics of spatial aggregation, but there are differences between different parameters. The local spatial distribution also shows aggregation characteristics, and different member stars show different spatial distribution characteristics and trends. In general, this study starts from a new perspective of geo-spatial correlation analysis, systematically and quantitatively describes the spatial distribution characteristics of globular cluster member stars, deepens the understanding of the internal spatial structure and mechanism of globular clusters, and provides new ideas for the study of globular clusters

YES

 Hits 413  Downloads 95  Comment 0