## Equations of motion of a test particle with spin and self-gravity

Papapetrou's equations of motion of a spinning particle in general relativity are extended to the case of a nonsymmetric stress-energy tensor in order to include the test particle's self-gravity. There are derivations of the spin tensor and the momentum tensor and their equations of motion, including gravitational radiation reaction. There is a treatment of a test particle with self-gravity charge, and electromagnetic moment. The dynamical role of the test particle's self-gravity is illustrated in the weak-field approximation. The principal conclusion is that the test particle's Newtonian gravitational potential energy contributes to the test particle's inertial mass (under electromagnetic forces) inmore »