The gravitational bending of acoustic Schwarzschild black hole

• Published in: The European physical journal. C, Particles and fields Particles and fields, 2023-04, Vol.83 (4), p.271-271, Article 271
• Main Authors: Qiao, Chen-Kai, Zhou, Mi
• Format: Article
• Language: English
• Subjects: Acoustics; Astronomy; Astrophysics and Cosmology; Bending; Black holes; Dark matter; Deflection; Elementary Particles; Geodesy; Gravitational effects; Gravitational lenses; Gravitational waves; Gravity; Hadrons; Heavy Ions; High energy physics; Measurement Science and Instrumentation; Nuclear Energy; Nuclear Physics; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Regular - Theoretical Physics; Regular Article - Theoretical Physics; Spacetime; String Theory; Theory of relativity
• ISSN: 1434-6044; 1434-6052; 1434-6052
• DOI: 10.1140/epjc/s10052-023-11376-3

Acoustic black hole is becoming an attractive topic in recent years, for it open-up new direction for experimental/observational explorations of black holes. In this work, the gravitational bending of acoustic Schwarzschild black hole is investigated. The gravitational deflection angle of particles traveling along null geodesics, weak gravitational lensing and Einstein ring for acoustic Schwarzschild black hole are carefully studied and analyzed. Particularly, in the calculation of gravitational deflection angle, we resort to two approaches—the Gauss–Bonnet theorem and the geodesic method. The results show that the gravitational bending effect in acoustic Schwarzschild black hole is enhanced, compared with conventional Schwarzschild black hole. This result indicates that the acoustic black holes may be more easily detectable in gravitational bending effects and weak gravitational lensing observations.