Gravitational spectrum of black holes in the Einstein-Aether theory

TL;DR

This paper investigates the gravitational perturbations of black holes in Einstein-Aether theory, revealing distinctive oscillation and damping features that could be detectable with future gravitational wave experiments.

Contribution

It provides the first detailed analysis of gravitational perturbations in Einstein-Aether black holes, highlighting observable differences from Schwarzschild black holes.

Findings

Einstein-Aether black holes have higher oscillation frequencies.

Damping rates are larger in Einstein-Aether black holes.

Potential for observational detection with advanced gravitational antennas.

Abstract

Evolution of gravitational perturbations, both in time and frequency domains, is considered for a spherically symmetric black hole in the non-reduced Einstein-Aether theory. It is shown that real oscillation frequency and damping rate are larger for the Einstein-Aether black hole than for the Schwarzschild black hole. This may provide an opportunity to observe aether in the forthcoming experiments with new generation of gravitational antennas.