The Gravitational Bending of Acoustic Schwarzschild Black Hole

TL;DR

This paper investigates how acoustic Schwarzschild black holes bend particles and light, revealing enhanced gravitational effects that could make them easier to detect than traditional black holes.

Contribution

It introduces the study of gravitational bending in acoustic Schwarzschild black holes using two methods, showing enhanced effects compared to classical black holes.

Findings

Enhanced gravitational deflection angle in acoustic black holes

Potential for easier detection via gravitational lensing

Comparison of two calculation methods (Gauss-Bonnet and geodesic)

Abstract

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.