The Structural and Kinematic Evolution of Central Star Clusters in Dwarf Galaxies and Their Dependence on Dark Matter Halo Profiles

摘要: Through a suite of direct N-body simulations, we explore how the structural and kinematic evolution star cluster located at center dwarf galaxy is affected by shape its host's dark matter density profile. The stronger central tidal fields cuspier halos minimize cluster's ability to expand in response mass loss due stellar during early evolutionary stages subsequent long-term driven two-body relaxation. Hence clusters evolving are characterized more compact sizes, higher velocity dispersions remain approximately isotropic all clustercentric distances. Conversely, cored can develop distribution profile that becomes increasingly radially anisotropic larger Finally, dispersion profiles results them having longer relaxation times. cuspy galaxies relax slower rate and, consequently, they both less segregated farther from complete energy equipartition than galaxies. Application this work observations allows for be used as tools measure distinguish isolated ultra-faint