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Dynamical descalarization in binary black hole mergers
Hector O. Silva, Helvi Witek, Matthew Elley +1
Scalar fields coupled to the Gauss-Bonnet invariant can undergo a tachyonic instability, leading to spontaneous scalarization of black holes. Studies of this effect have so far bee…
Nonlinear curvature effects in gravitational waves from inspiralling black hole binaries
Banafsheh Shiralilou, Tanja Hinderer, Samaya Nissanke +2
Gravitational waves (GWs) from merging black holes allow for unprecedented probes of strong-field gravity. Testing gravity in this regime requires accurate predictions of gravitati…
Evolution of black hole shadows from superradiance
Gastón Creci, Stefan Vandoren, Helvi Witek
Black holes have turned into cosmic laboratories to search for ultra-light scalars by virtue of the superradiant instability. In this paper we present a detailed study of the impac…
Towards numerical relativity in scalar Gauss-Bonnet gravity: 3+1 decomposition beyond the small-coupling limit
Helvi Witek, Leonardo Gualtieri, Paolo Pani
Scalar Gauss-Bonnet gravity is the only theory with quadratic curvature corrections to general relativity whose field equations are of second differential order. This theory allows…
Prospects for Fundamental Physics with LISA
Enrico Barausse, Emanuele Berti, Thomas Hertog +318
In this paper, which is of programmatic rather than quantitative nature, we aim to further delineate and sharpen the future potential of the LISA mission in the area of fundamental…