On propagation of electromagnetic and gravitational waves in the expanding Universe

[摘要] The purpose of this study was to obtain an equation for the propagation time of electromagnetic and gravitational waves in the expanding Universe. The velocity of electromagnetic waves propagation depends on the velocity of the interstellar medium in the observer's frame of reference. Gravitational radiation interacts weakly with the substance, so electromagnetic and gravitational waves propagate from a remote astrophysical object to the terrestrial observer at different time. Gravitational waves registration enables the inverse problem solution - by the difference in arrival time of electromagnetic and gravitational-wave signal, we can determine the characteristics of the emitting area of the astrophysical object.

[发布机构] Department of Physics, Bauman Moscow State Technical University, Moscow, Russia^1

[效力级别] 力学 [学科分类] 力学，机械学

[关键词] Astrophysical objects;Emitting areas;Frame of reference;Gravitational radiation;Gravitational-wave signals;Interstellar mediums;Inverse problem solution;Propagation time