11 citations · 26 across the 9 of their papers we have counts for
9 papers
Gravitational wave propagation through viscous matter
Vishnu Kakkat, Ulrich K. Beckering Vinckers, Nigel T. Bishop +4
It has been known that gravitational waves (GWs) transfer energy to viscous matter through which they propagate, but the effect is too weak to be astrophysically significant. Using…
Gravitational wave interactions with matter: beyond quadrupolar perturbations
Ulrich K. Beckering Vinckers, Nigel T. Bishop
Previous work has developed the theory of linearized gravitational wave (GW) interactions with matter using the Bondi-Sachs formalism, but with the perturbations restricted to be q…
Gravitational wave interactions with a viscous fluid: Core collapse supernova, binary neutron star merger, and accretion around a black hole merger
Nigel T. Bishop, Vishnu Kakkat, Monos Naidoo
The interaction of gravitational waves (GWs) with matter is normally treated as being insignificant. However, recent work has shown that the interaction with a viscous fluid may be…
The interaction between gravitational waves and a viscous fluid shell on a Schwarzschild background
Nigel T. Bishop
Previous work has shown that the interaction between gravitational waves (GWs) and a shell of viscous matter leads to damping of the GWs and heating of the matter, and that these e…
Astrophysical and cosmological scenarios for gravitational wave heating
Nigel T. Bishop, Vishnu Kakkat, Amos S. Kubeka +2
Gravitational waves (GWs) passing through a viscous shell of matter are expected to be damped resulting in an increase in the temperature of the fluid as energy is transferred to i…
Quasinormal modes of a Schwarzschild black hole within the Bondi-Sachs framework
Bishop Mongwane, Sipho Nkele, Didam G. A. Duniya +1
Studies of quasinormal modes (QNMs) of black holes have a long and well established history. Predominantly, much research in this area has customarily focused on the equations give…
The interaction of gravitational waves with matter
Nigel T. Bishop, Vishnu Kakkat, Amos S. Kubeka +2
It is well-known that gravitational waves undergo no absorption or dissipation when traversing through a perfect fluid. However, in the presence of a viscous fluid, GWs transfer en…
Observational cosmology using characteristic numerical relativity: Characteristic formalism on null geodesics
P. J. van der Walt, N. T. Bishop
The characteristic formalism of numerical relativity is based on a system of coordinates aligned with outgoing null cones. While these coordinates were designed for studying gravit…
Observational cosmology using characteristic numerical relativity
P. J. van der Walt, N. T. Bishop
The characteristic formalism in numerical relativity, which has been developed to study gravitational waves, and the observer metric approach in observational cosmology both make u…