Search for growing angular modes in ultracompact boson star evolutions

TL;DR

This paper investigates non-spherical modes in ultracompact boson stars through spherical harmonic decomposition, building on previous stability studies that focused on radial modes.

Contribution

It introduces a method to analyze non-spherical modes in boson star simulations, extending understanding beyond radial stability.

Findings

Evidence for long-term stability of ultracompact boson stars.

Identification of non-spherical modes via spherical harmonic decomposition.

Abstract

Recent fully non-linear simulations of ultracompact spherically symmetric boson stars have presented evidence for their long-term stability. All observed dynamics could be mainly attributed to the fundamental radial mode. In this work, we additionally decompose some of the data in spherical harmonics, providing a first step towards the characterization of non-spherical modes present.