Speaker
Seppe Staelens
(University of Cambridge)
Description
Ultracompact black hole mimickers formed through gravitational collapse under reasonable assumptions obtain light rings in pairs, where one is unstable and the other one is not. Stable light rings are believed to be a potential source for dynamical instability due to the trapping of massless perturbations, as the decay of these modes is relatively slow.
We have performed fully nonlinear dynamical evolutions of spherically symmetric, ultracompact solitonic boson stars in 3+1 dimensions. We find no evidence of an instability after evolving the objects for ~1000 light crossing times, suggesting that the proposed mechanism may not be efficient after all to effectively destroy ultracompact black hole mimickers.
Author
Seppe Staelens
(University of Cambridge)
