Context. Observations of young multiple star systems find a bimodal distribution in
companion frequency and separation. The origin of these peaks has often been attributed to …

We use Gaia DR2 to hunt for runaway stars from the Orion Nebula Cluster (ONC). We
search a region extending 45 around the ONC and out to 1 kpc to find sources that have …

We present a catalogue of 3354 candidate young stars within 500 pc that appear to have
been ejected from their parent associations with relative speeds of> 5 km s− 1. These …

In this paper, the third in the series, we continue our study of combinatorics in chaotic
Newtonian dynamics. We study the chaotic four-body problem in Newtonian gravity …

We study the stellar kinematic properties and spatial distribution of the association Cyg OB3
using precise astrometric data from Gaia DR2. All known O-and B-type stars in Cyg OB3 …

The evolution of main-sequence binaries that reside in the Galactic Centre can be heavily
influenced by the central supermassive black hole (SMBH). Due to these perturbative …

In this paper, the fourth in the series, we continue our study of combinatorics in chaotic
Newtonian dynamics. We focus once again on the chaotic four-body problem in Newtonian …

We study the formation of runaway stars due to binary–binary (2+ 2) interactions in young
star-forming clusters and/or associations. This is done using a combination of analytic …

In this paper, we continue our analysis of the chaotic four-body problem and our study of
binary–binary interactions in star clusters. We present a general ansatz-based analytical …

We present a half-life formalism for describing the disruption of gravitationally bound few-
body systems, with a focus on binary–binary scattering. For negative total encounter …