4 papers · 1 filter
Black hole binaries in shift-symmetric Einstein-scalar-Gauss-Bonnet gravity
Maxence Corman, Llibert Aresté Saló, Katy Clough
In shift-symmetric Einstein-scalar-Gauss-Bonnet gravity, stationary black holes have a non-vanishing scalar charge. During the inspiral, the phase evolution is modified by several…
Restrictions on Initial Conditions in Cosmological Scenarios and Implications for Simulations of Primordial Black Holes and Inflation
Thomas W. Baumgarte, Katy Clough, John T. Giblin
Numerical relativity simulations provide a means by which to study the evolution and end point of strong over-densities in cosmological spacetimes. Specific applications include st…
Challenges in the nonlinear evolution of unequal mass binaries in sGB gravity
Llibert Aresté Saló, Daniela D. Doneva, Katy Clough +2
It has only recently become possible to simulate the full nonlinear dynamics of binary black holes in scalar-Gauss-Bonnet theories of gravity. The simulations remain technically ch…
Inflaton Dynamics in Higher-Derivative Scalar-Tensor Theories of Gravity
Sam E. Brady, Katy Clough, Pau Figueras +1
During inflation, higher derivative terms in the gravitational action may play a significant role. Building on new stable formulations of four-derivative scalar-tensor theories, we…