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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…
Black hole sensitivities in Einstein-scalar-Gauss-Bonnet gravity
Félix-Louis Julié, Hector O. Silva, Emanuele Berti +1
The post-Newtonian dynamics of black hole binaries in Einstein-scalar-Gauss-Bonnet theories of gravity depends on the so-called "sensitivities", quantities which characterize a bla…