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Light rings and light points of boson stars
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This work is devoted to the study of photon trajectories around rotating boson stars. The basic properties of boson star models are given with a particular emphasis on the high compactness those objects can have. Using an effective potential method, circular orbits of photons around rotating boson stars are then obtained, at least for relativistic enough configurations. A particular class of light rings, in which the photons are at rest on a stable orbit, is exhibited. By this one means that the associated worldline is collinear to the Killing vector corresponding to the asymptotic time translation symmetry. It is proposed to call those orbits light points. Their existence is very specific to boson stars and the link between light points and ergoregions is investigated.
Forward citations
Cited by 3 Pith papers
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Characterizing the Properties and Constitution of Compact Objects in Gravitational-Wave Binaries
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Hayward Boson Stars
Hayward boson stars exist only when sqrt(beta)/Q > 1.49661, exactly where the vacuum Hayward spacetime has no horizon.
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Dynamical Boson Stars
Boson stars are particle-like solutions in general relativity that model dark matter, black hole mimickers, and binary systems.
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