Does NGC 6397 contain an intermediate-mass black hole or a more diffuse inner subcluster? - Vitral, Eduardo; Mamon, Gary A. (Astronomy and astrophysics (Berlin), 2021)
Keywords: Anisotropy; Astrophysics; Black holes; Density; Galactic clusters; Globular clusters; Gravitational waves; Hubble Space Telescope; Neutron stars; Physics; Space telescopes; White dwarf stars; stars: kinematics and dynamics; globular clusters: individual: NGC 6397; methods: data analysis; black hole physics; stars: statistics; proper motions