skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Observations and nonstandard FRW models. [Friedmann-Robertson-Walker]

Abstract

The observational predictions of various nonstandard cosmological models which have an FRW metric as their space-time geometry are investigated. The general numerical predictions of the models are found to be in accord with actual observations; in particular, they predict a current relative velocity of the Galaxy with respect to the CMB consistent with measurements of the dipole anisotropy of the CMB temperature distribution, and also predict a quadrupole anisotropy, the magnitude of which is well below the upper limits obtained from observations. The distance versus redshift relationship is calculated in a typical model and is found to be the same as in the corresponding standard FRW model. The critical density problem is addressed, and the behavior of the expansion in the models is investigated. The thermodynamics of the models is considered, and the predicted helium abundance in the models is calculated and found to be in accord with current estimates. In particular, in a class of two-fluid models the predicted helium abundance is virtually the same as that in the corresponding standard FRW model. 31 references.

Authors:
Publication Date:
Research Org.:
Dalhousie Univ., Halifax, Canada
OSTI Identifier:
6085715
Resource Type:
Journal Article
Journal Name:
Astrophys. J.; (United States)
Additional Journal Information:
Journal Volume: 318
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COSMOLOGICAL MODELS; ABUNDANCE; ANISOTROPY; BARYONS; CONSERVATION LAWS; COSMOLOGY; DENSITY; EXPANSION; HELIUM; MASS DISTRIBUTION; METRICS; MILKY WAY; SPACE-TIME; THERMODYNAMICS; VELOCITY; DISTRIBUTION; ELEMENTARY PARTICLES; ELEMENTS; FERMIONS; FLUIDS; GALAXIES; GASES; HADRONS; MATHEMATICAL MODELS; NONMETALS; PHYSICAL PROPERTIES; RARE GASES; SPATIAL DISTRIBUTION; 640106* - Astrophysics & Cosmology- Cosmology

Citation Formats

Coley, A A. Observations and nonstandard FRW models. [Friedmann-Robertson-Walker]. United States: N. p., 1987. Web. doi:10.1086/165386.
Coley, A A. Observations and nonstandard FRW models. [Friedmann-Robertson-Walker]. United States. https://doi.org/10.1086/165386
Coley, A A. 1987. "Observations and nonstandard FRW models. [Friedmann-Robertson-Walker]". United States. https://doi.org/10.1086/165386.
@article{osti_6085715,
title = {Observations and nonstandard FRW models. [Friedmann-Robertson-Walker]},
author = {Coley, A A},
abstractNote = {The observational predictions of various nonstandard cosmological models which have an FRW metric as their space-time geometry are investigated. The general numerical predictions of the models are found to be in accord with actual observations; in particular, they predict a current relative velocity of the Galaxy with respect to the CMB consistent with measurements of the dipole anisotropy of the CMB temperature distribution, and also predict a quadrupole anisotropy, the magnitude of which is well below the upper limits obtained from observations. The distance versus redshift relationship is calculated in a typical model and is found to be the same as in the corresponding standard FRW model. The critical density problem is addressed, and the behavior of the expansion in the models is investigated. The thermodynamics of the models is considered, and the predicted helium abundance in the models is calculated and found to be in accord with current estimates. In particular, in a class of two-fluid models the predicted helium abundance is virtually the same as that in the corresponding standard FRW model. 31 references.},
doi = {10.1086/165386},
url = {https://www.osti.gov/biblio/6085715}, journal = {Astrophys. J.; (United States)},
number = ,
volume = 318,
place = {United States},
year = {Wed Jul 01 00:00:00 EDT 1987},
month = {Wed Jul 01 00:00:00 EDT 1987}
}