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astro-ph.GA2026

Evolution of Binaries Under Stochastic Perturbations

Andrea Caputo, Giovanni Maria Tomaselli, Chris Hamilton

The paper presents a Fokker‑Planck framework for modeling how Keplerian binary systems evolve under random tidal and impulsive perturbations, providing explicit drift and diffusion…

astro-ph.GA2024

Kinetic Theory of Stellar Systems: A Tutorial

Chris Hamilton, Jean-Baptiste Fouvry

Stellar systems - star clusters, galaxies, dark matter haloes, and so on - are ubiquitous characters in the evolutionary tale of our Universe. This tutorial article is an introduct…

astro-ph.GA2024

Eccentricity dynamics of wide binaries -- II. The effect of stellar encounters and constraints on formation channels

Chris Hamilton, Shaunak Modak

GAIA wide stellar binaries (separations AU) are observed to have a superthermal eccentricity distribution function (DF), well-fit by with $…

astro-ph.GA2024

Binary mergers in the centers of galaxies: synergy between stellar flybys and tidal fields

Mila Winter-Granic, Cristobal Petrovich, Valentín Peña-Donaire +1

Galactic centers are very dynamically active environments, often harbouring a nuclear star cluster and supermassive black hole at their cores. Binaries in these environments are su…

astro-ph.GA2024

Saturation of spiral instabilities in disk galaxies

Chris Hamilton

Spiral density waves can arise in galactic disks as linear instabilities of the underlying stellar distribution function. Such an instability grows exponentially in amplitude at so…