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First analytical calculation of black hole shadow in McVittie metric
Oleg Yu. Tsupko, Gennady S. Bisnovatyi-Kogan
Cosmic expansion influences the angular size of black hole shadow. The most general way to describe a black hole embedded into an expanding universe is to use the McVittie metric.…
Shadow of black holes at local and cosmological distances
G. S. Bisnovatyi-Kogan, O. Yu. Tsupko, V. Perlick
A brief illustrative discussion of the shadows of black holes at local and cosmological distances is presented. Starting from definition of the term and discussion of recent observ…
Hills and holes in the microlensing light curve due to plasma environment around gravitational lens
Oleg Yu. Tsupko, Gennady S. Bisnovatyi-Kogan
In this paper, we investigate the influence of the plasma surrounding the gravitational lens on the effect of microlensing. In presence of plasma around the lens, the deflection an…
Gravitational Lensing in presence of Plasma: Strong Lens Systems, Black Hole Lensing and Shadow
Gennady S. Bisnovatyi-Kogan, Oleg Yu. Tsupko
In this article, we present an overview of the new developments in problems of the plasma influence on the effects of gravitational lensing, complemented by pieces of new material…
Black hole shadow as a standard ruler in cosmology
Oleg Yu. Tsupko, Zuhui Fan, Gennady S. Bisnovatyi-Kogan
Advancements in the black hole shadow observations may allow us not only to investigate physics in the strong gravity regime, but also to use them in cosmological studies. In this…