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arXiv · 1905.13460

Bounding Alternative Theories of Gravity with Multi-Band GW Observations

Giuseppe Gnocchi·Andrea Maselli·Tiziano Abdelsalhin·Nicola Giacobbo·Michela Mapelli
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Abstract

We study the constraints on alternative theories of gravity that can be determined by multi-band observations of gravitational wave signals emitted from binary black hole coalescences. We focus on three types of General Relativity modifications induced by a generalised Brans-Dicke theory, and two classes of quadratic gravity, Einstein-dilaton-Gauss-Bonnet and dynamical Chern-Simons. Considering a network of space and ground-based detectors, supplied by a population of spinning binaries black hole, we show how the multi-band analysis improves the existing bounds on the theory's parameters by several orders of magnitude, for both pre- and post-Newtonian deviations. Our results also show the fundamental role played by an interferometer in the frequency range between LISA and advanced detectors, in constraining possible deviations from General Relativity.

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Giuseppe Gnocchi, Andrea Maselli, Tiziano Abdelsalhin, Nicola Giacobbo, Michela Mapelli. 2019-09-04. Bounding Alternative Theories of Gravity with Multi-Band GW Observations. https://doi.org/10.1103/physrevd.100.064024

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