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arXiv · 2407.07792

Gravitational ringdown in the Minimal Theory of Massive Gravity

Hugo Roussille·François Larrouturou
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Abstract

This work focuses on gravitational perturbations of black holes in the self-accelerating branch of the Minimal Theory of Massive Gravity (MTMG). This theory is a healthy extension of GR which displays the feature of massive tensor modes, without additional polarizations, strong-coupling issues nor requiring screening mechanisms. We proceed by implementing a newly developed technique that, instead of considering a second-order Schr\"odinger-like reformulation of perturbation equations, relies on a first-order formulation and solves it asymptotically, before numerically deriving the quasi-normal modes. We find that the black holes of MTMG are stable, and that their quasi-normal modes smoothly differ from the GR ones, for non-vanishing values of the graviton mass. This work hence confirms the fact that GR is a smooth limit of MTMG, and opens the exciting possibility of a clean test, performed for instance by the LISA detector.

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BibTeXRIS

Hugo Roussille, François Larrouturou. 2024-07-10. Gravitational ringdown in the Minimal Theory of Massive Gravity. https://doi.org/10.1103/physrevd.110.064069

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