Dynamical evolution of fermion-boson stars with realistic equations of state

TL;DR

This paper presents the first dynamical evolution of fermion-boson stars using realistic nuclear matter equations of state, revealing stability criteria and evolution pathways under perturbations.

Contribution

It introduces a novel dynamical simulation approach for fermion-boson stars with realistic matter models, analyzing their stability and evolution under perturbations.

Findings

Weakly perturbed unstable solutions can stabilize and migrate to stable configurations.

Criteria are identified for strongly perturbed solutions to avoid collapse.

The study enhances understanding of fermion-boson star stability and evolution.

Abstract

Fermion-boson stars are mixtures of the ordinary nuclear matter of a neutron star and bosonic dark matter. We dynamically evolve fermion-boson stars for the first time using a realistic equation of state for nuclear matter. We use our dynamical solutions to make a detailed study of the evolution of weakly and strongly perturbed static solutions. As examples of our findings, we identify a region of parameter space where weakly perturbed unstable static solutions migrate to a stable configuration and we determine the criteria under which strongly perturbed stable static solutions will always move to a stable configuration instead of collapsing to a black hole.