Kavli Affiliate: Ulrich Sperhake
| First 5 Authors: Gareth Arturo Marks, Seppe J. Staelens, Tamara Evstafyeva, Ulrich Sperhake,
| Summary:
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.
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