  We study the possibility that cosmological density perturbations are
generated by the inhomogeneous decay of right-handed neutrinos. This will occur
if a scalar field whose fluctuations are created during inflation is coupled to
the neutrino sector. Robust predictions of the model are a detectable level of
non-Gaussianity and, if standard leptogenesis is the source of the baryon
asymmetry, a baryon isocurvature perturbations at the level of the present
experimental constraints.
