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Dynamical Capture Binary Neutron Star Mergers
We study dynamical capture binary neutron star mergers as may arise in dense stellar regions such as globular clusters. Using general-relativistic hydrodynamics, we find that these mergers can result
Observing complete gravitational wave signals from dynamical capture binaries
We assess the detectability of the gravitational wave signals from highly eccentric compact binaries. We use a simple model for the inspiral, merger, and ringdown of these systems. The model is based
Relativistic Simulations of Eccentric Binary Neutron Star Mergers: One-arm Spiral Instability and Effects of Neutron Star Spin
We perform general-relativistic hydrodynamical simulations of dynamical capture binary neutron star mergers, emphasizing the role played by the neutron star spin. Dynamical capture mergers may take
Eccentric black hole-neutron star mergers: effects of black hole spin and equation of state
There is a high level of interest in black hole-neutron star binaries, not only because their mergers may be detected by gravitational wave observatories in the coming years, but also because of the
Superradiant Instability and Backreaction of Massive Vector Fields around Kerr Black Holes.
We study the growth and saturation of the superradiant instability of a complex, massive vector (Proca) field as it extracts energy and angular momentum from a spinning black hole, using numerical
Beginning inflation in an inhomogeneous universe
Using numerical solutions of the full Einstein field equations coupled to a scalar inflaton field in 3+1 dimensions, we study the conditions under which a universe that is initially expanding, highly
Eccentric black-hole-neutron-star mergers
Within the next few years gravitational waves (GWs) from merging black holes (BHs) and neutron stars (NSs) may be directly detected, making a thorough theoretical understanding of these systems a
Ultrarelativistic black hole formation.
The threshold for black hole formation is lower than simple hoop conjecture estimates, and near this threshold two distinct apparent horizons first form postcollision and then merge, and it is argued that this can be understood in terms of a gravitational focusing effect.
Spacetime dynamics of a Higgs vacuum instability during inflation
A remarkable prediction of the Standard Model is that, in the absence of corrections lifting the energy density, the Higgs potential becomes negative at large field values. If the Higgs field samples
Prospects for fundamental physics with LISA
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 physics. Given the