The gravitational bending of acoustic Schwarzschild black hole

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.

Automated summary

This study investigates the gravitational bending of acoustic Schwarzschild black hole and carefully analyzes the gravitational deflection angle of particles, weak gravitational lensing, and Einstein ring. The results show that gravitational bending effect is enhanced in acoustic Schwarzschild black hole compared to conventional Schwarzschild black hole, indicating that acoustic black holes may be more easily detectable in gravitational bending effects and weak gravitational lensing observations.