  We extend the results of our paper "Attractors for two dimensional waves with
homogeneous Hamiltonians of degree 0" written with Laure Saint-Raymond to the
case of forced linear wave equations in any dimension. We prove that, in
dimension 2,if the foliation on the boundary at infinity of the energy shell is
Morse-Smale, we can apply Mourre's theory and hence get the asymptotics of the
forced solution. We also characterize the wavefrontsets of the limit Schwartz
distribution using radial propagation estimates.
