16 citations · 57 across the 9 of their papers we have counts for
19 papers · 1 filter
Exact Bachian singularity in quadratic gravity
Simon Knoska, David Kofron, Robert Svarc
For specifically coupled values of the quadratic gravity parameters, we present a fully explicit static spherically symmetric solution. It contains the central singularity surround…
Linear perturbations of Kerr black hole in quadratic gravity
Simon Knoska, David Kofron, Robert Svarc
Employing the Newman-Penrose formalism and following the classic Teukolsky-like approach, we linearise the field equations of quadratic gravity on the Kerr background and combine t…
Cut-and-paste for impulsive gravitational waves with : The mathematical analysis
Clemens Sämann, Benedict Schinnerl, Roland Steinbauer +1
Impulsive gravitational waves are theoretical models of short but violent bursts of gravitational radiation. They are commonly described by two distinct spacetime metrics, one of l…
An interpretation of spacetimes with expanding impulsive gravitational waves generated by snapped cosmic strings
David Kofron, Michal Karamazov, Robert Svarc
The geometric properties of spacetimes representing expanding impulsive gravitational waves, propagating on a flat background and generated by snapped cosmic strings, are studied.…
The Newman-Penrose formalism in quadratic gravity
Robert Svarc, Alena Pravdova, David Miskovsky
The quadratic gravity constraints are reformulated in terms of the Newman-Penrose-like quantities. In such a frame language, the field equations represent a linear algebraic system…
Black holes and other spherical solutions in quadratic gravity with a cosmological constant
Vojtech Pravda, Alena Pravdova, Jiri Podolsky +1
We study static spherically symmetric solutions to the vacuum field equations of quadratic gravity in the presence of a cosmological constant . Motivated by the trace no-hair th…