18 papers
Age and metallicity of the Milky Way's nuclear star cluster studied at 3 pc from Sagittarius A*
E. Gallego-Cano, R. Schödel, T. K. Fritz +5
The Milky Way's nuclear star cluster (NSC) is a unique laboratory to study the formation and evolution of dense stellar systems around a supermassive black hole. Previous work sugg…
A spectroscopic map of the Galactic centre: Integrated light and dynamical modelling
A. Feldmeier-Krause, T. I. Maindl, G. van de Ven +3
The centre of the Milky Way is occupied by a nuclear star cluster that contains the supermassive black hole Sgr A*. The cluster is embedded in the larger surrounding nuclear stella…
Distribution function-based modelling of discrete kinematic datasets, in application to the Milky Way nuclear star cluster
Eugene Vasiliev, Anja Feldmeier-Krause, Mattia C. Sormani
We present a method for constructing dynamical models of stellar systems described by distribution functions and constrained by discrete-kinematic data. We implement various improv…
Self-consistent modelling of the Milky Way's Nuclear Stellar Disc
Mattia C. Sormani, Jason L. Sanders, Tobias K. Fritz +14
The Nuclear Stellar Disc (NSD) is a flattened high-density stellar structure that dominates the gravitational field of the Milky Way at Galactocentric radius $30\lesssim R\lesssim…
oMEGACat. X. Shedding light on the disrupted dwarf galaxy of Omega Centauri
Stefano Souza, Nadine Neumayer, Anil C. Seth +15
Omega Centauri (Cen) is the most massive and chemically complex star cluster in the Milky Way and is widely regarded as the surviving nuclear star cluster of an accreted dwar…
oMEGACat. IX. Chemical Tagging of Omega Centauri Populations with Machine-Learning-Inferred Abundances from the MUSE Spectrograph
Z. Wang, A. C. Seth, C. Clontz +14
We present chemical abundance measurements for 7,302 red giant branch stars within the half-light radius (~5') of Centauri ( Cen), derived from MUSE spectra using the neur…