Many evolution problems in physics are described by partial differential equations on an
infinite domain; therefore, one is interested in the solutions to such problems for a given …

Axions are some of the best motivated particles beyond the Standard Model. We show how
the attractive self-interactions of dark matter (DM) axions over a broad range of masses, from …

Gravitational-wave observations of black hole ringdowns are commonly used to characterize
binary merger remnants and to test general relativity. These analyses assume linear black …

We present results of 3D numerical simulations using a finite difference code featuring fixed
mesh refinement (FMR), in which a subset of the computational domain is refined in space …

Solitonic boson stars are stable objects made of a complex scalar field with a compactness
that can reach values comparable to that of neutron stars. A recent study of the collision of …

We study the merger of binary neutron stars using different realistic, microphysical nuclear
equations of state, as well as incorporating magnetic field and neutrino cooling effects. In …

We present a new three-dimensional fully general-relativistic hydrodynamics code using
high-resolution shock-capturing techniques and a conformal traceless formulation of the …

We consider the properties and dynamics of black holes within a family of alternative
theories of gravity, namely Einstein-Maxwell-dilaton theory. We analyze the dynamical …

We study a higher derivative extension to General Relativity and present a fully nonlinear/
nonperturbative treatment to construct initial data and study its dynamical behavior in …

Observations of gravitational radiation from compact binary systems provide an
unprecedented opportunity to test general relativity in the strong field dynamical regime. In …