On surfaces with p_g=q=2, K^2=5 and Albanese map of degree 3

Abstract

We construct a connected, irreducible component of the moduli space of minimal surfaces of general type with $p_g=q=2$ and $K^2=5$, which contains both examples given by Chen-Hacon and the first author. This component is generically smooth of dimension 4, and all its points parametrize surfaces whose Albanese map is a generically finite triple cover.

arXiv comment35 pages, 2 figures. Final version, to appear in the Osaka Journal of Mathematics