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- W3120592013 abstract "We study odd parity perturbations of spherically symmetric black holes with time-dependent scalar hair in shift-symmetric higher-order scalar-tensor theories. The analysis is performed in a general way without assuming the degeneracy conditions. Nevertheless, we end up with second-order equations for a single master variable, similarly to cosmological tensor modes. We thus identify the general form of the quadratic Lagrangian for the odd parity perturbations, leading to a generalization of the Regge-Wheeler equation. We also investigate the structure of the effective metric for the master variable and refine the stability conditions. As an application of our generalized Regge-Wheeler equation, we compute the quasinormal modes of a certain nontrivial black-hole solution. Finally, our result is extended to include the matter energy-momentum tensor as a source term." @default.
- W3120592013 created "2021-01-18" @default.
- W3120592013 creator A5050543744 @default.
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- W3120592013 date "2021-04-22" @default.
- W3120592013 modified "2023-10-14" @default.
- W3120592013 title "Perturbations and quasinormal modes of black holes with time-dependent scalar hair in shift-symmetric scalar-tensor theories" @default.
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- W3120592013 doi "https://doi.org/10.1103/physrevd.103.084041" @default.
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