107 citations · 200 across the 2 of their papers we have counts for
4 papers
Stability of rotating scalar boson stars with nonlinear interactions
Nils Siemonsen, William E. East
We study the stability of rotating scalar boson stars, comparing those made from a simple massive complex scalar (referred to as mini boson stars), to those with several different…
Modeling and searching for a stochastic gravitational-wave background from ultralight vector bosons
Leo Tsukada, Richard Brito, William E. East +1
Ultralight bosons, which are predicted in a variety of beyond-Standard-Model scenarios as dark-matter candidates, can trigger the superradiant instability around spinning black hol…
Gravitational wave signatures of ultralight vector bosons from black hole superradiance
Nils Siemonsen, William E. East
In the presence of an ultralight bosonic field, spinning black holes are unstable to superradiance. The rotational energy of the black hole is converted into a non-axisymmetric, os…
Test black holes, scattering amplitudes and perturbations of Kerr spacetime
Nils Siemonsen, Justin Vines
It has been suggested that amplitudes for quantum higher-spin massive particles exchanging gravitons lead, via a classical limit, to results for scattering of spinning black holes…