Long-term stable nonlinear evolutions of ultracompact black-hole mimickers
arXiv:2504.17775 · doi:10.1103/lk48-7r2f
Abstract
We study the stability of ultracompact boson stars admitting light rings combining a perturbative analysis with 3+1 numerical-relativity simulations with and without symmetry assumptions. We observe excellent agreement between all perturbative and numerical results which uniformly support the hypothesis that this family of black-hole mimickers is separated into stable and unstable branches by extremal-mass configurations. This separation includes, in particular, thin-shell boson stars with light rings located on the stable branch which we conclude to represent long-term stable black-hole mimickers.
13 pages, 14 figures. Version accepted to PRL. Fixed typo in Table 1
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