Computational methods for collisional stellar systems

R Spurzem, A Kamlah - Living Reviews in Computational Astrophysics, 2023 - Springer
Dense star clusters are spectacular self-gravitating stellar systems in our Galaxy and across
the Universe—in many respects. They populate disks and spheroids of galaxies as well as …

Empirical measurement of the dynamical ages of three globular clusters and some considerations on the use of the dynamical clock

FR Ferraro, B Lanzoni, E Vesperini… - The Astrophysical …, 2023 - iopscience.iop.org
We have used the" dynamical clock" to measure the level of dynamical evolution reached by
three Galactic globular clusters (namely, NGC 3201, NGC 6316, and NGC 6440). This is an …

The impact of stellar evolution on rotating star clusters: the gravothermal-gravogyro catastrophe and the formation of a bar of black holes

AWH Kamlah, R Spurzem, P Berczik… - Monthly Notices of …, 2022 - academic.oup.com
We present results from a suite of eight direct N-body simulations, performed with nbody6++
gpu, representing realistic models of rotating star clusters with up to 1.1× 105 stars. Our …

Effects of massive central objects on the degree of energy equipartition of globular clusters

FI Aros, E Vesperini - Monthly Notices of the Royal Astronomical …, 2023 - academic.oup.com
We present an analysis of the degree of energy equipartition in a sample of 101 Monte Carlo
numerical simulations of globular clusters (GCs) hosting either a system of stellar-mass …

The role of rotation on the formation of second generation stars in globular clusters

E Lacchin, F Calura, E Vesperini… - Monthly Notices of …, 2022 - academic.oup.com
By means of 3D hydrodynamic simulations, we explore the effects of rotation in the formation
of second-generation (SG) stars in globular clusters (GC). Our simulations follow the SG …

A numerical study of stellar discs in galactic nuclei

T Panamarev, B Kocsis - Monthly Notices of the Royal …, 2022 - academic.oup.com
We explore the dynamics of stellar discs in the close vicinity of a supermassive black hole
(SMBH) by means of direct N-body simulations. We show that an isolated nuclear stellar disc …

Mass segregation and dynamics of primordial binaries in star clusters with a radially anisotropic velocity distribution

V Pavlík, E Vesperini - Monthly Notices of the Royal …, 2022 - academic.oup.com
This paper is the third in a series investigating, by means of N-body simulations, the
implications of an initial radially anisotropic velocity distribution on the dynamics of star …

First observational evidence of a relation between globular clusters' internal rotation and stellar masses

M Scalco, A Livernois, E Vesperini… - Monthly Notices of …, 2023 - academic.oup.com
Several observational studies have shown that many Galactic globular clusters (GCs) are
characterized by internal rotation. Theoretical studies of the dynamical evolution of rotating …

Energy equipartition in multiple-population globular clusters

AR Livernois, FI Aros, E Vesperini… - Monthly Notices of …, 2024 - academic.oup.com
We present the results of Monte Carlo simulations aimed at exploring the evolution towards
energy equipartition of first-(1G) and second-generation (2G) stars in multiple-population …

Jeans modelling of weakly flattened ellipsoidal systems

A Mancino, L Ciotti, S Pellegrini… - Monthly Notices of the …, 2024 - academic.oup.com
In the homoeoidal expansion, a given ellipsoidally stratified density distribution and its
associated potential are expanded in the (small) density flattening parameter η, and usually …