Scalar Gravitational Radiation from Binaries: Vainshtein Mechanism in
  Time-dependent Systems
  We develop a full four-dimensional numerical code to study scalar
gravitational radiation emitted from binary systems and probe the Vainshtein
mechanism in situations that break the static and spherical symmetry, relevant
for binary pulsars as well as black holes and neutron stars binaries. The
present study focuses on the cubic Galileon which arises as the decoupling
limit of massive theories of gravity. Limitations associated with the numerical
methods prevent us from reaching a physically realistic hierarchy of scales;
nevertheless, within this context we observe the same power law scaling of the
radiated power as previous analytic estimates, and confirm a strong suppression
of the power emitted in the monopole and dipole as compared with quadrupole
radiation. Following the trend to more physically realistic parameters, we
confirm the suppression of the power emitted in scalar gravitational radiation
and the recovery of General Relativity with good accuracy. This paves the way
for future numerical work, probing more generic, physically relevant situations
and sets of interactions that may exhibit the Vainshtein mechanism.
