742 citations · 3.9k across the 49 of their papers we have counts for
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Gravitational waves from extreme-mass-ratio systems in astrophysical environments
Vitor Cardoso, Kyriakos Destounis, Francisco Duque +2
We establish a generic, fully-relativistic formalism to study gravitational-wave emission by extreme-mass-ratio systems in spherically-symmetric, non-vacuum black-hole spacetimes.…
Gravitational-wave imprints of compact and galactic-scale environments in extreme-mass-ratio binaries
Kyriakos Destounis, Arun Kulathingal, Kostas D. Kokkotas +1
Circumambient and galactic-scale environments are intermittently present around black holes that reside in active galactic nuclei. As supermassive black holes impart energy on thei…
Pseudospectrum of horizonless compact objects: a bootstrap instability mechanism
Valentin Boyanov, Kyriakos Destounis, Rodrigo Panosso Macedo +2
Recent investigations of the pseudospectrum in black hole spacetimes have shown that quasinormal mode frequencies suffer from spectral instabilities. This phenomenon may severely a…
Dynamical behavior of the -metric: charged scalar fields, quasinormal modes and superradiance
Kyriakos Destounis, Giacomo Mascher, Kostas D. Kokkotas
The -metric is a boost-symmetric spacetime solution to the vacuum Einstein field equations which describes black holes that are uniformly accelerated under the tension of a cosm…
New Horizons for Fundamental Physics with LISA
K. G. Arun, Enis Belgacem, Robert Benkel +138
The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders about the fundamental theory of nature at play in the extreme gravity regime, where the gravitatio…
Charged black holes in de Sitter space: superradiant amplification of charged scalar waves and resonant hyperradiation
Giacomo Mascher, Kyriakos Destounis, Kostas D. Kokkotas
Black holes typically inhabit highly dynamical galactic environments and are frequently permeated by accretion media. The inevitable scattering of scalar, electromagnetic and gravi…
Astrophysics with the Laser Interferometer Space Antenna
Pau Amaro Seoane, Jeff Andrews, Manuel Arca Sedda +156
The Laser Interferometer Space Antenna (LISA) will be a transformative experiment for gravitational wave astronomy, and, as such, it will offer unique opportunities to address many…