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Temperature Fluctuations of the Microwave Background in Primeval Isocurvature Baryon Models

Published online by Cambridge University Press:  25 May 2016

S. N. Dutta  and
G. Efstathiou
S. N. Dutta
Affiliation:
Department of Physics, University of Oxford, OX1 3NP, United Kingdom
G. Efstathiou
Affiliation:
Department of Physics, University of Oxford, OX1 3NP, United Kingdom

Abstract

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We calculate the temperature fluctuations in the microwave background in open primeval isocurvature baryon models (Peebles, 1987) with cosmological densities in the range 0.05 ≤ ω ≤ 0.2 We assume that the power spectrum of fluctuations is a power law with the index varying between – 1 ≤ n ≤ 0, as indicated by observations of large scale structure in the Universe. The Universe is assumed to be always fully ionized. The South Pole 13 field point experiment (Schuster et al., 1993) is compared to our theoretical predictions, and we find that the models predict larger temperature fluctuations than are observed. The observed temperature fluctuations on intermediate scales of ≲ 1° thus seem difficult to reconcile with the isocurvature baryon model.

Type
Part II: Contributed Papers
Information
Symposium - International Astronomical Union , Volume 168: Examining the Big Bang and the Diffuse Background Radiations , 1996 , pp. 441 - 444
Copyright
Copyright © Kluwer 1996 

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