84 citations · 429 across the 17 of their papers we have counts for
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gr-qc2019★ 18 cited
Free motion around black holes with discs or rings: between integrability and chaos -- VI. The Melnikov method
L. Polcar, O. Semerák
Motivated by black holes surrounded by accretion structures, we consider in this series static and axially symmetric black holes "perturbed" gravitationally as being encircled by a…
astro-ph.HE2019★ 13 cited
Free motion around black holes with discs or rings: between integrability and chaos -- V
L. Polcar, P. Suková, O. Semerák
Complete integrability of geodesic motion, the well known feature of the fields of isolated stationary black holes, can easily be "spoilt" by the presence of some additional source…
gr-qc2019★ 1 cited
Schwarzschild binary supported by an Appell ring
O. Semerák, M. Basovník, P. Kotlařík
We continue to study black holes subjected to strong sources of gravity, again paying special attention to the behaviour of geometry in the black-hole interior. After examining, in…