  Models of the accretion disks of Young Stellar Objects show that they should
not be ionized at a few AU from the star, and thus not subject to the MHD
turbulence believed to cause accretion. This has been suggested to create a
'Dead Zone' where accretion remains unexplained. Here we show that the
existence of the Dead Zone self-consistently creates a density profile
favorable to the Rossby Wave Instability of Lovelace et al. (1999). This
instability will create and sustain Rossby vortices in the disk which could
lead to enhanced planet formation.
