Compact binary systems in scalar-tensor gravity: Equations of motion to 2.5 post-Newtonian order
Compact binary systems in scalar-tensor gravity: Equations of motion to 2.5 post-Newtonian order
We calculate the explicit equations of motion for non-spinning compact objects to 2.5 post-Newtonian order, or O(v/c)^5 beyond Newtonian gravity, in a general class of scalar-tensor theories of gravity. We use the formalism of the Direct Integration of the Relaxed Einstein Equations (DIRE), adapted to scalar-tensor theory, coupled with an …