Primary Proca Hair And The Double-Peak Optics Of Black Holes
January 2026
in “
Physical review. D/Physical review. D.
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Studysummary In this study, researchers found that black holes with primary Proca hair exhibit distinctive optical properties, including a two-boundary shadow structure and additional inner rings, offering novel observational signatures and potential insights into strong-gravity environments.
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The study investigates black holes with primary Proca hair, focusing on the unique double-peak structure in the effective potential caused by a massive vector field. This structure significantly alters the motion of photons and particles, resulting in new dynamical and observational effects. The research classifies geodesics and explores conditions for multiple circular orbits, emphasizing changes in the photon sphere, shadows, and lensing. Notably, the black-hole shadow may develop a two-boundary structure with inner rings, differing from the standard Schwarzschild black holes. These findings suggest observable effects in electromagnetic spectra, emphasizing the importance of double-barrier optical phenomena in strong-gravity observations.
