Gravitational Wave Perturbations on a Kerr Background and Applications for Echoes

Abstract

Gravitational wave echoes may imply physics beyond general relativity; however, several approaches to searching for echoes require fitting the data to toy templates which are not physically motivated. Here, I create a procedure which outputs a more realistic form for echoes, starting from initial conditions, by calculating the modulated transfer function.

arXiv comment16+1 pages, 9 figures

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• Not quite black holes at LIGO
• Gravitational wave echoes from interacting quark stars
• Tidal response and near-horizon boundary conditions for spinning exotic compact objects
• Rescaling strange-cluster stars and its implications on gravitational-wave echoes
• Unruh-DeWitt Detector Differentiation of Black Holes and Exotic Compact Objects