402 citations · 1.8k across the 74 of their papers we have counts for
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gr-qc2018★ 90 cited
Shadow of a black hole at cosmological distance
Gennady S. Bisnovatyi-Kogan, Oleg Yu. Tsupko
Cosmic expansion is expected to influence on the size of black hole shadow observed by comoving observer. Except the simplest case of Schwarzschild black hole in de Sitter universe…
gr-qc2018★ 209 cited
Black hole shadow in an expanding universe with a cosmological constant
Volker Perlick, Oleg Yu. Tsupko, Gennady S. Bisnovatyi-Kogan
We analytically investigate the influence of a cosmic expansion on the shadow of the Schwarzschild black hole. We suppose that the expansion is driven by a cosmological constant on…