Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· arXiv e-print (arXiv:astro-ph/9312033)
· References in the article
· Citations to the Article (182) (Citation History)
· Refereed Citations to the Article
· Also-Read Articles (Reads History)
· HEP/Spires Information
·
· Translate This Page
Title:
The three-point correlation function of the cosmic microwave background in inflationary models
Authors:
Gangui, Alejandro; Lucchin, Francesco; Matarrese, Sabino; Mollerach, Silvia
Affiliation:
AA(SISSA, Trieste, Italy), AB(SISSA, Trieste, Italy), AC(Univ. di Padova, Padova, Italy), AD(Univ. di Padova, Padova, Italy)
Publication:
The Astrophysical Journal, vol. 430, no. 2, pt. 1, p. 447-457 (ApJ Homepage)
Publication Date:
08/1994
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL MODELS, CORRELATION COEFFICIENTS, COSMIC BACKGROUND EXPLORER SATELLITE, GRAVITATIONAL FIELDS, PERTURBATION THEORY, TEMPERATURE DISTRIBUTION, ANGULAR RESOLUTION, ASTROPHYSICS, COSMOLOGY, DATA CORRELATION, MICROWAVE RADIOMETERS, SKEWNESS, STOCHASTIC PROCESSES, UNIVERSE
DOI:
10.1086/174421
Bibliographic Code:
1994ApJ...430..447G

Abstract

We analyze the temperature three-point correlation function and the skewness of the cosmic microwave background, providing general relations in terms of multipole coefficients. We then focus on applications to large angular scale anisotropies, such as those measured by the Cosmic Background Explorer Satellite (COBE) differential microwave radiometer (DMR) calculating the contribution to these quantities from primordial, inflation-generated, scalar perturbations, via the Sachs-Wolfe effect. Using the techniques of stochastic inflation, we are able to provide a universal expression for the ensemble-averaged three-point function and for the corresponding skewness, which accounts for all primordial second-order effects. These general expressions would, moreover, apply to any situation where the bispectrum of the primordial gravitational potential has a hierarchical form. Our results are then specialized to a number of relevant models: power-law inflation driven by an exponential potential, chaotic inflation with a quartic and quadratic potential, and a particular case of hybrid inflation. In all these cases non-Gaussian effects are small: as an example, the mean skewness is much smaller than the cosmic rms skewness implied by a Gaussian temperature fluctuation field.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences


More Article Retrieval Options

HELP for Article Retrieval
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints