Testing for the Gaussian nature of cosmological density perturbations through the three-point temperature correlation function

One of the crucial aspects of density perturbations that are produced by the standard inflation scenario is that they are Gaussian where seeds produced by topological defects tend to be non-Gaussian. The three-point correlation function of the temperature anisotropy of the cosmic microwave backgroun...

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Bibliographic Details
Published in:Physical review letters 1993-08, Vol.71 (8), p.1124-1127
Main Authors: Luo, Xiaochun, Schramm, David N.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics
Background radiations
Cosmology
Earth, ocean, space
Exact sciences and technology
General relativity and gravitation
Other topics in general relativity and gravitation
Particle-theory and field-theory models of the early universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.)
Physics
Stellar systems. Galactic and extragalactic objects and systems. The universe
Unidentified sources and radiation outside the solar system
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Summary:One of the crucial aspects of density perturbations that are produced by the standard inflation scenario is that they are Gaussian where seeds produced by topological defects tend to be non-Gaussian. The three-point correlation function of the temperature anisotropy of the cosmic microwave background radiation (CBR) provides a sensitive test of this aspect of the primordial density field. In this paper, this function is calculated in the general context of various allowed non-Gaussian models. It is shown that the Cosmic Background Explorer and the forthcoming South Pole and balloon CBR anisotropy data may be able to provide a crucial test of the Gaussian nature of the perturbations.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.71.1124