Persistence of the Feigenbaum attractor in one-parameter families

Consider a map psi(0) of class C-r for large r of a manifold of dimension n greater than of equal to 2 having a Feigenbaum attractor. We prove that any such psi(0) is a point of a local codimension-one manifold of C-r transformations also exhibiting Feigenbaum attractors. In particular, the attractor persists when perturbing a one-parameter family transversal to that manifold at psi(0). We also construct such a transversal family for any given psi(0), and apply this construction to prove a conjecture by J. palls stating that a map exhibiting a Feigenbaum attractor can be perturbed to obtain homoclinic tangencies.