11 citations · 21 across the 6 of their papers we have counts for
6 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…
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…
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…
Effect of a viscous fluid shell on the propagation of gravitational waves
Nigel T. Bishop, Petrus J. van der Walt, Monos Naidoo
In this paper we show that there are circumstances in which the damping of gravitational waves (GWs) propagating through a viscous fluid can be highly significant; in particular, t…
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…