Schwarzschild black holes and propagation of electromagnetic and gravitational waves

TL;DR

This paper discusses how perturbations in Schwarzschild black holes produce quasinormal modes, which encode information about the black hole's properties, and presents bounds on the energy of these oscillations.

Contribution

It provides recent bounds on the diffused energy in Schwarzschild spacetime and estimates of the energy of excited quasinormal modes.

Findings

Bounds on diffused energy in Schwarzschild spacetime

Estimates of energy of excited quasinormal modes

Implications for identifying black hole parameters

Abstract

Disturbing of a spacetime geometry may result in the appearance of an oscillating and damped radiation - the so-called quasinormal modes. Their periods of oscillations and damping coefficients carry unique information about the mass and the angular momentum, that would allow one to identify the source of the gravitational field. In this talk we present recent bounds on the diffused energy, applicable to the Schwarzschild spacetime, that give also rough estimates of the energy of excited quasinormal modes.