Boson stars driven to the brink of black hole formation
Scott H. Hawley, Matthew W. Choptuik

TL;DR
This paper investigates the threshold between dispersal and black hole formation in boson stars, revealing critical solutions that resemble unstable boson stars and analyzing their stability and energy transfer during collapse.
Contribution
It introduces a method to construct and analyze Type I critical solutions for boson stars, extending stability analysis and exploring the dynamics near black hole formation thresholds.
Findings
Critical solutions resemble unstable boson stars
A small matter halo appears in solutions below 90% of maximum mass
Unstable boson stars may be unstable to dispersal or black hole formation
Abstract
We present a study of black hole threshold phenomena for a self-gravitating, massive complex scalar field in spherical symmetry. We construct Type I critical solutions dynamically by tuning a one-parameter family of initial data composed of a boson star and a massless real scalar field. The real field is used to perturb the boson star via a gravitational interaction which results in a {\em significant} transfer of energy. The resulting critical solutions, which show great similarity with unstable boson stars, persist for a finite time before dispersing or forming a black hole. We extend the stability analysis of Gleiser and Watkins [Nucl. Phys. B319, 733 (1989)], providing a method for calculating the radial dependence of boson star modes of nonzero frequency. We find good agreement between our critical solutions and boson star modes. For critical solutions less than 90% of the maximum…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
