1.5k citations · 6.4k across the 52 of their papers we have counts for
5 papers · 1 filter
Spin-up and mass-gain in hyperbolic encounters of spinning black holes
Healey Kogan, Frederick C. L. Pardoe, Helvi Witek
Scattering black holes spin up and gain mass through the re-absorption of orbital angular momentum and energy radiated in gravitational waves during their encounter. In this work,…
Dephasing in binary black hole mergers surrounded by scalar wave dark matter clouds
Cheng-Hsin Cheng, Giuseppe Ficarra, Helvi Witek
Scalar fields of masses between and can exhibit enhanced gravitational interactions with black holes, and form scalar clouds around the…
Black-hole hair from vector dark matter accretion
Fredric Hancock, Helvi Witek
We model a single black hole in equilibrium with a dark photon-cold dark matter environment. Representing the dark photon as a Proca field, we show that a Schwarzschild black hole…
The Science of the Einstein Telescope
Adrian Abac, Raul Abramo, Simone Albanesi +485
Einstein Telescope (ET) is the European project for a gravitational-wave (GW) observatory of third-generation. In this paper we present a comprehensive discussion of its science ob…
Growing black-hole hair in nonminimally coupled biscalar gravity
Chloe Richards, Alexandru Dima, Deborah Ferguson +1
Black holes offer a unique laboratory for fundamental physics and are crucial for probing theories beyond Einstein's theory of General Relativity. In this paper, we consider 4D eff…