PIRSA:11050000

Maximizing the scientific return from cosmic non-Gaussianity

APA

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

MLA

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

BibTex

          @misc{ scivideos_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 for Theoretical Physics},
            year = {2011},
            month = {may},
            note = {PIRSA:11050000 see, \url{https://scivideos.org/index.php/pirsa/11050000}}
          }
          

Chris Byrnes Universität Bielefeld

Talk numberPIRSA:11050000
Source RepositoryPIRSA
Talk Type Scientific Series
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.