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Title:
Anisotropies of the cosmic background radiation in a 'hot' dark matter universe
Authors:
Anninos, Peter; Matzner, Richard A.; Tuluie, Robin; Centrella, Joan
Affiliation:
AA(Texas, University, Austin), AB(Texas, University, Austin), AC(Texas, University, Austin), AD(Drexel University, Philadelphia, PA)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 382, Nov. 20, 1991, p. 71-78. (ApJ Homepage)
Publication Date:
11/1991
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Computational Astrophysics, Dark Matter, Relic Radiation, Universe, Anisotropy, Astronomical Models, Numerical Integration, Red Shift, Thomson Scattering
DOI:
10.1086/170694
Bibliographic Code:
1991ApJ...382...71A

Abstract

Microwave photons propagating through the evolving density inhomogeneities in a model universe filled with 'hot' dark matter are investigated. The calculation performed is fully 3D and the density inhomogeneities are followed into the nonlinear regime. The effect of Thomson scattering throughout the model history is included, using a Monte Carlo scattering algorithm. The optical depth for this scattering is a function of time determined by the free electron density, which is obtained by this numerical integration of the relevant equations in this particular model universe. The results are presented in the form of sky maps such as an observer might make; the maps are of 4 x 4 deg and 2 x 2 deg regions.

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