Dipole currents and interstellar propagation of electromagnetic signals

We present results of our investigations on the propagation of EM signals through interstellar medium that is supposed to be formed by neutral atomic hydrogen gas with rather low density. We describe the model under consideration and obtain the partial differential equation for one of the EM field components, as well as formulation of the initial-boundary value problem for that equation and the method for its solution in the time domain. EM signals propagation over billions light years distance through such medium is studied for various combinations of its parameters