Baryosynthesis and the origin of galaxies

Details Baryosynthesis and the origin of galaxies Baryosynthesis and the origin of galaxies

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.291..469b&link_type=abstract

Nature, vol. 291, June 11, 1981, p. 469-472. Research supported by the Science Research Council

Other

28

Baryons, Big Bang Cosmology, Galactic Evolution, Nuclear Fusion, Universe, Adiabatic Conditions, Gravitational Waves, Isothermal Processes, Perturbation Theory

Scientific paper

In the gravitational instability theory, the present structure in the universe is envisaged to have evolved from small initial inhomogeneities which are of two generic types: isothermal and adiabatic. It has been shown that in the grand unified theory (GUT) for baryosynthesis, primordial isothermal perturbations are incompatible with the standard Friedman-Robertson-Walker universe. Here four non-standard models in which the two are compatible are discussed. Of these models, two prove to be viable: (1) a universe which is initially dominated by large-scale inhomogeneous shear and (2) a universe which undergoes a de Sitter phase during the GUT phase transition. A means by which new constraints on chaotic behavior near the cosmological singularity may be deduced is also shown.

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