Compressible aspects of slow solar wind formation

Recently we have shown how the slow solar wind can be formed within a coron al helmet streamer. The solar wind is modeled by a "wake neutral" sheet, wh ose subsequent linear and nonlinear evolution provides clues to the develop ment of the wind. In this paper we describe the first results of our extens ion of this model to the compressible regime. In particular, we show that t raveling density enhancements are formed, similar to those observed by LASC O. The compressible equations are solved by an extension to MHD of the SPEC LS algorithm.