Time delay of radiation from pulsar in a binary system that moves in field of Schwarzschild black hole

Abstract

A compact binary star that moves in a strong external gravitational field of a Schwarzschild black hole is considered. Decomposition of the redshift into a series with respect to the size of the binary system is obtained. This expression is used to calculate the redshift for a model binary system. Possible application of the results is discussed.

Optical Characteristics of Electromagnetic Radiation, Emitted by Particles or Stars Moving near Supermassive Black Hole

“…However, the influence of the gravitational field on the propagation of light was neglected. In our previous paper [30], we showed that the last effect must also generally be taken into account. Unlike the cited papers, our works use fully generally relativistic approaches in calculations.…”