摘要
The electromagnetic radiation emitted by each star which is considered as an electric dipole in a galaxy is the solution of the electromagnetic equation in the universe. The Poynting vector giving the intensity of light has different forms in the co-movingisotropic, the Robertson-Walker and the standard spherical systems of coordinates. As the first-order approximation, the velocity-distance (or redshift-intensity) relation isthe same in all of these systems of coordinates, but in the second-order approximation there are differences between them. The redshift-intensity relation obtained also depends upon the number of stars in the receding galaxy or upon its mass. So the present treatment of relativistic cosmology, different from the usual geometric treatment, is a dynamic and electromagnetic approach to the problem.
The electromagnetic radiation emitted by each star which is considered as an electric dipole in a galaxy is the solution of the electromagnetic equation in the universe. The Poynting vector giving the intensity of light has different forms in the co-movingisotropic, the Robertson-Walker and the standard spherical systems of coordinates. As the first-order approximation, the velocity-distance (or redshift-intensity) relation isthe same in all of these systems of coordinates, but in the second-order approximation there are differences between them. The redshift-intensity relation obtained also depends upon the number of stars in the receding galaxy or upon its mass. So the present treatment of relativistic cosmology, different from the usual geometric treatment, is a dynamic and electromagnetic approach to the problem.
