4 papers
Debye superpotential for charged rings or circular currents on Kerr black hole
David Kofroň, Petr Kotlařík
We provide an explicit, closed and compact expression for the Debye superpotential of a circular source. This superpotential is obtained by integrating the Green function of Teukol…
Cosmic strings in axisymmetric black hole spacetimes; the C--metric "engines"
David Kofroň
The interpretation of so-called cosmic string in black hole spacetimes has settled down to an unsatisfactory state. In this article we try to provide a different model for these co…
Separability of test fields equations on the C-metric background
David Kofroň
In the Kerr-Newman spacetime the Teukolsky master equation, governing the fundamental test fields, is of great importance. We derive an analogous master equation for the non-rotati…
Variations on spacetimes with boost-rotation symmetry
Jiří Bičák, David Kofroň
Some new results on the boost-rotation symmetric spacetimes representing pairs of rotating charged objects accelerated in opposite directions are summarized. A particular attention…