The nonlinear tails in black hole ringdown: the scattering perspective

Article Article scientifique Article The nonlinear tails in black hole ringdown: the scattering perspective eng 2025-10-15 2025 author Ianniccari Andréa U. Geneva (main) 416335 Département de physique théorique (FITEO) author Lo Bianco Lorenzo Geneva U., CAP 441612 author Riotto Antonio Walter Geneva U., CAP 650982 Département de physique théorique (FITEO) 062 10.1088/1475-7516/2025/10/062 1475-7516 2507.17732 https://iopscience.iop.org/article/10.1088/1475-7516/2025/10/062 Black holes regain their static configuration by emitting ringdown gravitational waves, whose amplitude decays in time following a power law at fixed spatial positions. We show that the nonlinear decay power law may be obtained by simple scattering calculations using the in-in formalism and argue that the nonperturbative law should be t$^{-2ℓ-1}$, where ℓ is the multipole of the propagating spherical gravitational wave. GR black holes Gravitational waves / theory Gravitational waves in GR and beyond: theory Dewey 500.2 37 Département de physique théorique 133 false Journal of cosmology and astroparticle physics 10 10 c77d1638-e232-4845-885c-5da0409f6ee2 Article (Published version) Public Ianniccari_2025_J._Cosmol._Astropar.pdf 1594865 application/pdf CC BY-4.0 68f15d73146b0d8300848a22370c2e5ab4c788634359663f6da9342dc03286f6 openAccess Faculté des sciences / Section de physique / Département de physique théorique

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The nonlinear tails in black hole ringdown: the scattering perspective	Journal of cosmology and astroparticle physics			2025	4	63

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Lo Bianco, Lorenzo