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Fuzzball Shadows: Emergent Horizons from Microstructure

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arxiv 2103.12075 v2 pith:VBNFU25F submitted 2021-03-22 hep-th astro-ph.HEgr-qchep-ph

classification hep-thastro-ph.HEgr-qchep-ph
keywords blackfuzzballfuzzballshorizonlimitmicrostructurenearscaling
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We study the physical properties of four-dimensional, string-theoretical, horizonless "fuzzball" geometries by imaging their shadows. Their microstructure traps light rays straying near the would-be horizon on long-lived, highly redshifted chaotic orbits. In fuzzballs sufficiently near the scaling limit this creates a shadow much like that of a black hole, while avoiding the paradoxes associated with an event horizon. Observations of the shadow size and residual glow can potentially discriminate between fuzzballs away from the scaling limit and alternative models of black compact objects.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. A Universal Framework for Horizon-Scale Tests of Gravity with Black Hole Shadows

    gr-qc 2025-11 conditional novelty 6.0 of 10

    An adaptive ray-tracing and MCMC framework estimates shadow observables for arbitrary stationary metrics; applied to the Kerr–Bertotti–Robinson spacetime it yields an Sgr A* horizon-scale magnetic field of about 93 G ...

  2. Schwarzschild Black Holes Immersed in Born-Infeld Magnetic Fields and Their Observational Signatures

    gr-qc 2025-06 conditional novelty 6.0 of 10

    Numerically solving full Born-Infeld magnetic fields around a Schwarzschild black hole makes meridional photon orbits prolate and elongates the black hole shadow along the polar axis at high inclination.

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