Ringdown of Charged Compact Objects using Membrane Paradigm

TL;DR

This paper investigates the gravitational wave ringdown signals of charged horizonless compact objects using the membrane paradigm, aiming to distinguish them from black holes and explore their potential observational signatures.

Contribution

It introduces a membrane paradigm approach to model the ringdown of charged compact objects, providing a versatile framework for analyzing their gravitational wave signatures.

Findings

Ringdown signals differ from black holes, offering potential observational tests.

Membrane paradigm effectively models boundary conditions for various compact objects.

Results suggest distinguishable gravitational wave features for horizonless objects.

Abstract

Although the black holes are an integral part of the standard model of astrophysics and cosmology, their existence poses some serious fundamental problems. In recent years, several horizonless compact object models were proposed to address those issues. As the gravitational wave detectors started to observe more and more merger events with a large signal-to-noise ratio, gravitational wave spectroscopy could hold the key to uncover the existence of these objects. This is because the late time ringdown signals of horizonless compact objects differ from that of the black holes. In this paper, we study the ringdown properties of charged compact objects and compare them with those obtained in the black hole scenario. Since the internal structure and the equation of state of these compact objects are largely unknown, we employ membrane paradigm to obtain appropriate boundary conditions for the perturbations of these objects. This model can describe the ringdown properties of a large variety of compact objects.