Hybrid dynamics of Hénon mappings

For studying the meromorphic degeneration of complex dynamics, the theory of hybrid spaces, introduced by Boucksom, Favre and Jonsson, is known to be a strong tool. In this paper, we apply this theory to the dynamics of Hénon maps. For a family of Hénon maps $\{H_t{\}}_{t\in {\mathbb{D}}^{\ast }}$ that is parametrized by a unit punctured disk and meromorphically degenerates at the origin, we show that as $t\to 0$, the family of the invariant measures $\{{\mu }_t\}$ “weakly converges” to a measure on the Berkovich affine plane associated to the non-archimedean Hénon map determined by the family $\{H_t{\}}_t$. We also calculate the limit of their Lyapunov exponents.