Skewness of Cosmic Microwave Background Temperature Fluctuations Due to Non-linear Gravitational Instability

Preprint

1 June 1995

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.astro-ph/9501100

Abstract

Skewness of temperature fluctuations of the cosmic microwave background (CMB) produced by initially Gaussian adiabatic perturbations with the flat (Harrison-Zeldovich) spectrum, which arises due to non-linear corrections to a gravitational potential at the matter-dominated stage, is calculated quantitatively. For the standard CDM model, the effect appears to be smaller than expected previously and lies below the cosmic variance limit even for small angles. The sign of the skewness is opposite to that of the skewness of density perturbations.

Keywords

COSMIC MICROWAVE BACKGROUND
BACKGROUND TEMPERATURE
MICROWAVE BACKGROUND
LINEAR GRAVITATIONAL
FLUCTUATIONS DUE
SKEWNESS

All Related Versions

Version 1, 1995-01-28, ArXiv
Version 2, 1995-06-01, ArXiv
Published version: The Astrophysical Journal, 454, 552.

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