Work

Boson stars in D ⩾ 4 dimensions: stability, oscillation frequencies, and dynamical evolutions

Year: 2026

Type: article

Abstract: We construct spherically symmetric boson star (BS) solutions in D ∈ { 4 , 5 , 6 } spacetime dimensions, considering the effects of both a quartic self-interaction term and a solitonic potential. We then perform a perturbative analysis, generalizing the pulsation equations to arbitrary dimension and potential and hence demonstrating the existence of radially stable higher-dimensional BS solutions. In particular, we find stable solutions for D ∈ { 5 , 6 } with a quartic self-interaction term and for D = 5 with a solitonic potential. We supplement these linear results with perturbed and unperturbed nonlinear dynamical evolutions in spherical symmetry, obtained using a dimensional reduction that allows us to evolve spacetimes with any number of background dimensions using the same numerical framework, while preserving the full gauge freedom of standard approaches to numerical relativity. The results of these evolutions indicate that the solutions we identify as perturbatively stable are indeed generally stable to nonlinear spherical dynamics.

Source: Classical and Quantum Gravity

DOI: 10.1088/1361-6382/ae60bc

Authors: Gareth Arturo Marks, Abdullah Al Zaif

Institution: University of Cambridge

Language: English

Topic: Pulsars and Gravitational Waves Research

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,325