Michael Hilker

TL;DR: In this paper, the authors derived the mean proper motions and space velocities of 154 Galactic globular clusters and the velocity dispersion profiles of 141 Globular clusters based on a combination of Gaia DR2 proper motions with ground-based line-of-sight velocity.

TL;DR: In this paper, the authors determined masses, stellar mass functions, and structural parameters of 112 Milky Way globular clusters by fitting a large set of N-body simulations to their velocity dispersion and surface density profiles.

TL;DR: An all-object survey of the Fornax galaxy cluster revealed a new population of compact members, overlooked in previous conventional surveys, and it is demonstrated that these ‘ultra-compact’ dwarf galaxies are structurally and dynamically distinct from both globular star clusters and known types of dwarf galaxies, and thus represent a new class of dwarf galaxy.

TL;DR: In this paper, the authors measured the velocities of 94 galaxies brighter than aboutVtot = 20 mag in the direction of the central Fornax cluster and found that all galaxies lie in the background.

TL;DR: Adaptive optics kinematic data of the ultra-compact dwarf galaxy M60-UCD1 that show a central velocity dispersion peak exceeding 100 kilometres per second and modest rotation are reported, implying a large population of previously unrecognized supermassive black holes in other ultra-Compact dwarf galaxies.