Globular Clusters within Dark Matter Halos: Case Studies of 47 Tuc, NGC 1851 and M 15. Issue Volume 12:Issue S316(2015) (31st March 2017)

• Record Type: Journal Article
• Authors: Lee, Joowon; Shin, Jihye; Kim, Sungsoo S.
• Editors: Charbonnel, Corinne; Nota, Antonella
• Is Part Of: Proceedings of the International Astronomical Union. Volume 12:Issue S316(2015)
• Page Start: 336
• Page End: 337
• Publication Date: 2017-03-31
• Subjects: stellar dynamics, -- methods: numerical, -- galaxy: globular clusters; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S174392131500890X
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: Globular clusters (GCs) are known to have a very small amount of or no dark matter (DM). Even if GCs are formed in individual DM halos, they must have lost the majority of the DM through dynamical processes such as mass segregation or tidal stripping. Using Fokker-Planck (FP) calculations, we investigate the dynamical evolution of three Galactic GCs with an assumption that they were formed in mini DM halos. We trace the amount of DM of 47 Tuc, NGC 1851, and M 15, which are a 'disk/bulge' cluster, an 'old halo' cluster, and a 'young halo' cluster, respectively. We find that these three GCs must have initially had insignificant amounts of DM, less than 10 percent of the initial stellar mass of each cluster.