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Quasinormal modes and their excitation beyond general relativity
Hector O. Silva, Giovanni Tambalo, Kostas Glampedakis +2
The response of black holes to small perturbations is known to be partially described by a superposition of quasinormal modes. Despite their importance to enable strong-field tests…
Gravitational radiation from a particle plunging into a Schwarzschild black hole: frequency-domain and semirelativistic analyses
Hector O. Silva, Giovanni Tambalo, Kostas Glampedakis +1
We revisit the classic problem of gravitational wave emission by a test particle plunging into a Schwarzschild black hole both in the frequency-domain Regge-Wheeler-Zerilli formali…
Tests of general relativity in the nonlinear regime: a parametrized plunge-merger-ringdown gravitational waveform model
Elisa Maggio, Hector O. Silva, Alessandra Buonanno +1
The plunge-merger stage of the binary-black hole coalescence, when the bodies' velocities reach a large fraction of the speed of light and the gravitational-wave luminosity peaks,…
Spontaneous scalarization
Daniela D. Doneva, Fethi M. Ramazanoğlu, Hector O. Silva +2
Scalarization is a mechanism that endows strongly self-gravitating bodies, such as neutron stars and black holes, with a scalar-field configuration. It resembles a phase transition…
Spin-induced dynamical scalarization, de-scalarization and stealthness in scalar-Gauss-Bonnet gravity during black hole coalescence
Matthew Elley, Hector O. Silva, Helvi Witek +1
Particular couplings between a scalar field and the Gauss-Bonnet invariant lead to spontaneous scalarization of black holes. Here we continue our work on simulating this phenomenon…
Black-hole ringdown as a probe of higher-curvature gravity theories
Hector O. Silva, Abhirup Ghosh, Alessandra Buonanno
Detecting gravitational waves from coalescing compact binaries allows us to explore the dynamical, nonlinear regime of general relativity and constrain modifications to it. Some of…