PIRSA:11050000

Maximizing the scientific return from cosmic non-Gaussianity

Byrnes, C. (2011). Maximizing the scientific return from cosmic non-Gaussianity. Perimeter Institute. https://pirsa.org/11050000

Byrnes, Chris. Maximizing the scientific return from cosmic non-Gaussianity. Perimeter Institute, May. 17, 2011, https://pirsa.org/11050000 

          @misc{ pirsa_PIRSA:11050000,
            doi = {10.48660/11050000},
            url = {https://pirsa.org/11050000},
            author = {Byrnes, Chris},
            keywords = {Cosmology},
            language = {en},
            title = {Maximizing the scientific return from cosmic non-Gaussianity},
            publisher = {Perimeter Institute},
            year = {2011},
            month = {may},
            note = {PIRSA:11050000 see, \url{https://pirsa.org}}
          }

Chris Byrnes

Universität Bielefeld

Talk number
PIRSA:11050000
Collection
Talk Type
Subject
Abstract
The model of local non-Gaussianity, parameterized by the constant non-linearity parameter fNL, is an extremely popular description of non-Gaussianity. However, a mild scale-dependence of fNL is natural. This scale dependence is a new observable, potentially detectable with the Planck satellite, which helps to further discriminate between models of inflation. It is sensitive to properties of the early universe which are not probed by the standard observables. In a complementary way, the trispectrum also contains important information about non-Gaussianity which the bispectrum does not capture. We explicitly calculate the scale dependence and trispectrum in several models including one with a very large infrared-loop contribution to the bispectrum and in various realizations of the curvaton scenario.