Binary black-hole dynamics at the third-and-a-half post-Newtonian order in the ADM formalism -: art. no. 044004

We specialize the radiation-reaction part of the Arnowitt-Deser-Misner Hamiltonian for many nonspinning pointlike bodies, calculated by Jaranowski and Schafer, to third-and-a-half post-Newtonian approximation to general relativity, to binary systems. This Hamiltonian is used for the computation of the instantaneous gravitational energy loss of a binary to 1PN reactive order. We also derive the equations of motion, which include PN reactive terms via Hamiltonian and Euler-Lagrangian approaches. The results are consistent with the expressions for reactive acceleration provided by the Iyer-Will formalism in a general class of gauges.