26 citations · 87 across the 7 of their papers we have counts for
7 papers
Relativistic disks by Appell-ring convolutions
David Kofroň, Petr Kotlařík, Oldřich Semerák
We present a new method for generating the gravitational field of thin disks within the Weyl class of static and axially symmetric spacetimes. Such a gravitational field is describ…
Static axisymmetric rings in general relativity: How diverse they are
O. Semerák
Three static and axially symmetric (Weyl-type) ring singularities -- the Majumdar-Papapetrou--type (extremally charged) ring, the Bach-Weyl ring and the Appell ring -- are studied…
On geometry of deformed black holes: II. Schwarzschild hole surrounded by a Bach-Weyl ring
M. Basovník, O. Semerák
We continue to study the response of black-hole space-times on the presence of additional strong sources of gravity. Restricting ourselves to static and axially symmetric (electro-…
On geometry of deformed black holes: I. Majumdar-Papapetrou binary
O. Semerák, M. Basovník
Although black holes are eminent manifestations of very strong gravity, the geometry of space-time around and even inside them can be significantly affected by additional bodies pr…
Particles under radiation thrust in Schwarzschild space-time from a flux perpendicular to the equatorial plane
Donato Bini, Andrea Geralico, Robert T. Jantzen +1
Motivated by the picture of a thin accretion disc around a black hole, radiating mainly in the direction perpendicular to its plane, we study the motion of test particles interacti…
Approximating light rays in the Schwarzschild field
Oldrich Semerak
A short formula is suggested which approximates photon trajectories in the Schwarzschild field better than other simple prescriptions from the literature. We compare it with variou…