Spatial Structure of open clusters by the 2MASS database

• Main Authors: Chin-Wei Chen, 陳錦威
• Other Authors: Wen-Ping Chen
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/78006145466945346675

碩士 === 國立中央大學 === 天文研究所 === 90 === We present results of a pilot program to study star clusters with the 2MASS database. While 2MASS cannot resolve the cores or detect much of the main sequence of globular clusters, the homogeneity and large angular coverage make the database suitable to study young star clusters. We show that very young star clusters have their stars --- regardless of their masses --- concentrated progressively toward the center, a result more from the formation process of the cluster than from subsequent stellar gravitational interaction. We show evidence of mass segregation, and effects of external disturbances on evolution of the spatial structure of many young star clusters.