374 citations · 5.4k across the 101 of their papers we have counts for
24 papers · 1 filter
Double-trace instability of BTZ black holes
Oscar J. C. Dias, David Sola Gil, Jorge E. Santos
We perform a comprehensive study of the linear stability of rotating BTZ black holes under massive scalar field perturbations with double-trace boundary conditions. While BTZ black…
Spinning Black Binaries in de Sitter space
Oscar J. C. Dias, Jorge E. Santos, Benson Way
We construct stationary, rotating black binaries in general relativity with a positive cosmological constant. We consider identical black holes with either aligned or anti-aligned…
Scalar QNM spectra of Kerr and Reissner-Nordström revealed by eigenvalue repulsions in Kerr-Newman
Alex Davey, Oscar J. C. Dias, Jorge E. Santos
Recent studies of the gravito-electromagnetic frequency spectra of Kerr-Newman (KN) black holes have revealed two families of quasinormal modes (QNMs), namely photon sphere modes a…
Black hole superradiant instability for massive spin-2 fields
Oscar J. C. Dias, Giuseppe Lingetti, Paolo Pani +1
Due to coherent superradiant amplification, massive bosonic fields can trigger an instability in spinning black holes, tapping their energy and angular momentum and forming macrosc…
Static Black Binaries in de Sitter
Oscar J. C. Dias, Gary W. Gibbons, Jorge E. Santos +1
We construct the first four-dimensional multi-black hole solution of general relativity with a positive cosmological constant. The solution consists of two static black holes whose…
Superradiance and black resonator strings encounter helical black strings
Oscar J. C. Dias, Takaaki Ishii, Keiju Murata +2
We construct a cohomogeneity-1 helical black string in six-dimensional Einstein gravity. The helical solution branches from the onset of the gravitational superradiant instability…