2011/11/30 by Christian T. Byrnes, Christian T Byrnes, Sami Nurmi +2 · 2 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Cosmology #Cosmology and Gravitation Theories #Field (mathematics) #Galaxies: Formation, Evolution, Phenomena #Inflation (cosmology) #Local field potential #Non-Gaussianity #Sky #Spectral density #astro-ph.CO #hep-th
paper · pdf · doi:10.1088/1475-7516/2012/03/012
published as JCAP 1203 (2012) 012 · 16 pages, 2 figures; v2: Minor changes and references added. Matches the published version
openalex publication_date 2012/03/07 · arxiv created 2012/09/27 · arxiv updated 2012/09/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
We propose a method to probe higher-order correlators of the primordial density field through the inhomogeneity of local non-Gaussian parameters, such as f NL , measured within smaller patches of the sky. Correlators between n -point functions measured in one patch of the sky and k -point functions measured in another patch depend upon the ( n + k )-point functions over the entire sky. The inhomogeneity of non-Gaussian parameters may be a feasible way to detect or constrain higher- order correlators in local models of non-Gaussianity, as well as to distinguish between single and multiple-source scenarios for generating the primordial density perturbation, and more generally to probe the details of inflationary physics.