2023/02/02 by Alex Kehagias, Kehagias, Alex, Antonio Riotto +1
Physics and Astronomy · Engineering · #Pulsars and Gravitational Waves Research #Astrophysical Phenomena and Observations #Geophysics and Sensor Technology
paper · pdf · doi:10.48550/arxiv.2302.01240
It has been recently shown that nonlinear effects emerging at the time of the generation of the quasi-normal modes are necessary to model ringdowns from black hole mergers. In this note, we describe how nonlinerarities also arise when defining gauge-invariant tensor modes and in the calculation of the observable measured in the interferometers beyond linear order.