# Gravitational wave propagation beyond general relativity: waveform distortions and echoes

@article{Ezquiaga2021GravitationalWP, title={Gravitational wave propagation beyond general relativity: waveform distortions and echoes}, author={Jose Mar{\'i}a Ezquiaga and Wayne Hu and Macarena Lagos and Meng-Xiang Lin}, journal={Journal of Cosmology and Astroparticle Physics}, year={2021}, volume={2021} }

We study the cosmological propagation of gravitational waves (GWs) beyond general relativity (GR) across homogeneous and isotropic backgrounds. We consider scenarios in which GWs interact with an additional tensor field and use a parametrized phenomenological approach that generically describes their coupled equations of motion. We analyze four distinct classes of derivative and non-derivative interactions: mass, friction, velocity, and chiral. We apply the WKB formalism to account for the…

## 2 Citations

Modified gravitational wave propagation with higher modes and its degeneracies with lensing

- Physics
- 2022

. Low-energy alternatives to General Relativity (GR) generically modify the phase of gravitational waves (GWs) during their propagation. As detector sensitivities increase, it becomes key to…

Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies

- PhysicsJournal of High Energy Astrophysics
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