108 citations · 170 across the 5 of their papers we have counts for
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gr-qc2018★ 32 cited
Spherical photon orbits in the field of Kerr naked singularities
Daniel Charbulák, Zdeněk Stuchlík
For the Kerr naked singularity (KNS) spacetimes, we study properties of spherical photon orbits (SPOs) confined to constant Boyer-Lindquist radius r. Some new features of the SPOs…
gr-qc2018★ 108 cited
Light escape cones in local reference frames of Kerr-de Sitter black hole spacetimes and related black hole shadows
Zdeněk Stuchlík, Daniel Charbulák, Jan Schee
We construct the light escape cones of isotropic spot sources of radiation residing in special classes of reference frames in the Kerr-de Sitter (KdS) black hole spacetimes, namely…