Non-gaussianity and cosmic uncertainty in curvaton-type models

Abstract

In curvaton-type models, observable non-gaussianity of the curvature perturbation would come from a contribution of the form $(\delta \sigma {)}^2$, where $\delta \sigma$ is gaussian. I analyse this situation allowing $\delta \sigma$ to be scale-dependent. The actual curvaton model is considered in more detail than before, including its cosmic uncertainty and anthropic status. The status of curvaton-type models after WMAP year three data is considered.

21 pages, wmap year three data considered

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