EAN: 9783319300658

SPRINGERBRIEFS IN PHYSICS THE SHADOW OF BLACK...

This book introduces an analytic method to describe the shadow of black holes. As an
introduction  it presents a survey of the attempts to observe the shadow of galactic black
holes. Based on a detailed discussion of the Plebanski-Demianski class of space-times  the book
derives analytical formulas for the photon regions and for the boundary curve of the shadow as
seen by an observer in the domain of outer communication. It also analyzes how the shadow
depends on the motion of the observer. For all cases  the photon regions and shadows are
visualized for various values of the parameters. Finally  it considers how the analytical
formulas can be used for calculating the horizontal and vertical angular diameters of the
shadow  and estimates values for the black holes at the centers of our Galaxy near Sgr A* and
of the neighboring galaxy M87.

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