Gravitational memory effects and Bondi-Metzner-Sachs symmetries in scalar-tensor theories

The relation between gravitational memory effects and Bondi-Metzner-Sachs symmetry of the asymptotically flat spacetimes is studied in scalar-tensor theory. For this purpose, solutions to equations motion near future null infinity are obtained generalized Bondi-Sachs coordinates with a suitable determinant condition. It turns out that group also semi-direct product an infinitesimal dimensional supertranslation Lorentz as general relativity. There degenerate vacua both tensor scalar sectors relates sector, while it transformation transforms each other. So there effect similar one relativity, effect, which new. evolution for Bondi mass angular momentum aspects suggest energy fluxes across induce transition among sectors, respectively.