Gravitational-Wave Tests of General Relativity with Ground-Based Detectors and Pulsar-Timing Arrays

2024/08/05 by Nicolás Yunes, Yunes, Nicolas, Xavier Siemens +3 · 49 citations
Physics and Astronomy · #Astronomy #Astrophysics #Classical mechanics #Cosmology and Gravitation Theories #Detector #General relativity #Geodesy #Geology #Geophysics #Gravitational wave #Gravitational-wave observatory #Numerical relativity #Optics #Physics #Pulsar #Pulsars and Gravitational Waves Research #Relativity and Gravitational Theory #Tests of general relativity #Theory of relativity

paper · pdf · doi:10.48550/arxiv.2408.05240

published in arXiv (Cornell University) (Cornell University)

openalex publication_date 2024/08/05 · openalex created_date 2024/09/10 · openalex updated_date 2026/08/06

Abstract

This review is focused on tests of Einstein's theory of general relativity with gravitational waves that are detectable by ground-based interferometers and pulsar-timing experiments. Einstein's theory has been greatly constrained in the quasi-linear, quasi-stationary regime, where gravity is weak and velocities are small. Gravitational waves are allowing us to probe a complimentary, yet previously unexplored regime: the non-linear and dynamical extreme gravity regime. Such a regime is, for example, applicable to compact binaries coalescing, where characteristic velocities can reach fifty percent the speed of light and gravitational fields are large and dynamical. This review begins with the theoretical basis and the predicted gravitational-wave observables of modified gravity theories. The review continues with a brief description of the detectors, including both gravitational-wave interferometers and pulsar-timing arrays, leading to a discussion of the data analysis formalism that is applicable for such tests. The review then discusses gravitational-wave tests using compact binary systems, and ends with a description of the first gravitational wave observations by advanced LIGO, the stochastic gravitational wave background observations by pulsar timing arrays, and the tests that can be performed with them..

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