The first generation of stars, often called Population III (or Pop III), form from metal-free
primordial gas at redshifts z∼ 30 and below. They dominate the cosmic star-formation …

We investigate the chaotic behaviour of the S-star cluster in the Galactic Centre using
precise N-body calculations, free from round-off or discretization errors. Our findings reveal …

Context. The three-body problem (3BP) poses a longstanding challenge in physics and
celestial mechanics. Despite the impossibility of obtaining general analytical solutions …

Eccentric mergers are a signature of the dynamical formation channel of binary black holes
(BBHs) in dense stellar environments and hierarchical triple systems. Here, we investigate …

The time-step criterion plays a crucial role in direct N-body codes. If not chosen carefully, it
will cause a secular drift in the energy error. Shared, adaptive time-step criteria commonly …

We study the influence of relativity on the chaotic properties and dynamical outcomes of an
unstable triple system; the Pythagorean three-body problem. To this end, we extend the …

Recent studies suggest that dark matter (DM) spikes around intermediate-mass black holes
could cause observable dephasing in gravitational wave (GW) signals from intermediate …

Theoretical predictions suggest that very massive stars have the potential to form through
multiple collisions and eventually evolve into intermediate-mass black holes (IMBHs) within …

Dynamical chaos is a fundamental manifestation of gravity in astrophysical, many-body
systems. The spectrum of Lyapunov exponents quantifies the associated exponential …

The recently observed population of 540 free-floating Jupiter-mass objects, including 40
dynamically soft pairs, and two triples, in the Trapezium cluster have raised interesting …