Publication: Quadrupolar radiation in de Sitter: displacement memory and Bondi metric
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IOP Publishing
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Abstract We obtain the closed form expression for the metric perturbation around de Sitter spacetime generated by a matter source below Hubble scale both in generalized harmonic gauge and in Bondi gauge up to quadrupolar order in the multipolar expansion, including both parities (i.e. both mass and current quadrupoles). We demonstrate that such a source causes a displacement memory effect close to future infinity that originates, in the even-parity sector, from a Λ-BMS transition between the two non-radiative regions of future infinity.
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High Energy Physics - Theory, gravitational wave memory, Bondi metric, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), BMS group, General Relativity and Quantum Cosmology, Gravitational waves, displacement memory, High Energy Physics - Theory (hep-th), Asymptotic procedures (radiation, news functions, \(\mathcal{H} \)-spaces, etc.) in general relativity and gravitational theory, de Sitter metric, Sciences exactes et naturelles