Hello, I was wondering if anyone has heard of or seen any work done into looking for what would be the analogue of stress in General Rel. for E&M. Im not talking about actual stress but the analogue to it. In the flat space metric with perturbations, linearized gravity begins to have close resemblance with E&M, save for the stress tensor. the densities and the currents are both analogues, however it doesnt look like E&M has a source for influence on the fields from what would be analogues for stress. Any comments on this?