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Photon Ring Astrometry for Superradiant Clouds

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arxiv 2211.03794 v2 pith:FNPNI7TC submitted 2022-11-07 gr-qc astro-ph.COastro-ph.HEhep-ph

Yifan Chen , Xiao Xue , Richard Brito , Vitor Cardoso This is my paper
classification gr-qcastro-ph.COastro-ph.HEhep-ph
keywords photonblackbosonsenergygeodesicsholesoscillatingring
verification ladder T0 review T1 audit T2 compute T3 formal
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Gravitational atoms produced from the superradiant extraction of rotational energy of spinning black holes can reach energy densities significantly higher than that of dark matter, turning black holes into powerful potential detectors for ultralight bosons. These structures are formed by coherently oscillating bosons, which induce oscillating metric perturbations deflecting photon geodesics passing through their interior. The deviation of nearby geodesics can be further amplified near critical bound photon orbits. We discuss the prospect of detecting this deflection using photon ring autocorrelations with the Event Horizon Telescope and its next-generation upgrade, which can probe a large unexplored region of the cloud mass parameter space when compared with previous constraints.

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Cited by 3 Pith papers

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