Twistor space for local systems on an open curve
Abstract
Let X=¯X−D be a smooth quasi-projective curve. We previously constructed a Deligne–Hitchin moduli space with Hecke gauge groupoid for connections of rank 2. We extend this construction to the case of any rank r, although still keeping a genericity hypothesis. The formal neighborhood of a preferred section corresponding to a tame harmonic bundle is governed by a mixed twistor structure.
Communicated by Luis Álvarez-Cónsul and Steven Bradlow