2006/10/31 by Paolo Creminelli, Leonardo Senatore, Matias Zaldarriaga +2 · 3 citations
Mathematics · Physics and Astronomy · #Amplitude #Anisotropy #Black Holes and Theoretical Physics #Cosmic microwave background #Cosmology and Gravitation Theories #Equilateral triangle #Function (biology) #Geometry #Mathematics #Microwave #Non-Gaussianity #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Statistical physics #astro-ph #hep-ph #hep-th
paper · pdf · doi:10.1088/1475-7516/2007/03/005
published as JCAP 0703:005,2007 · 10 pages, 3 figures; v2: added some comments and equations, corrected the comments on the constraint on the speed of sound
arxiv created 2007/03/05 · openalex publication_date 2007/03/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We analyse the three-year Wilkinson Microwave Anisotropy Probe data and look for a deviation from Gaussianity in the form of a three-point function that has either of the two theoretically motivated shapes: local and equilateral. There is no evidence of departure from Gaussianity and the analysis gives the currently tightest bounds on the parameters f NL local and f NL equil , which define the amplitudes of respectively the local non-Gaussianity and the equilateral non-Gaussianity: −36 < f NL local < 100, −256 < f NL equil < 332 at 95% C.L.