A cluster merger and the origin of the extended radio emission in Abell 3667

We present a numerical model for the extended steep-spectrum radio sources and the elongated X-ray structure in A3667 based on new three-dimensional M HD/N-body simulations. The X-ray and optical analyses of A3667 indicate tha t it has undergone a recent subcluster merger event. We believe that the Mp c-scale radio sources identified in A3667 are also a consequence of the mer ger. Our previous numerical simulations show that mergers often produce lar ge-scale shocks and turbulence capable of both magnetic field amplification and in situ reacceleration of relativistic particles. Our model suggests t hat these radio structures, separated by similar to 2.6 h(100)(-1) Mpc, are in fact causally linked via a slightly off-axis merger that occurred nearl y in the plane of the sky approximately 1 Gyr ago with a subcluster having a total mass equal to similar to 20% of the primary cluster.