Spherically symmetric solutions of massive gravity**Prepared for the proceedings of Peyresq Physics 12 (June 2007).

Abstract

We review briefly some properties of spherically symmetric solutions of ‘massive gravity’ concerning the van Dam–Veltman–Zakharov discontinuity, the important role of nonlinearities shown to occur in these types of models, as well as possible linearization instabilities. Those are discussed in the framework of the DGP model and bigravity theories.