Physics
Scientific paper
Jun 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980phys...21..614r&link_type=abstract
(University of Copenhagen, Danish Research Council and Nordisk Institut for Teoretisk Atomfysik, Copenhagen Symposium on the Uni
Physics
8
Astronomical Models, Cosmology, Dynamic Models, Entropy, Inhomogeneity, Universe, Antimatter, Evolution (Development), Galactic Clusters, Galaxies, Matter (Physics), Microwave Emission, Photon Density
Scientific paper
With regard to the physics of the early universe, the origin of the microwave background is discussed. Grand unification schemes are considered, as well as dissipative processes involving neutrino viscosity or pair creation from the gravitational field, and entropy production at recent epochs: emphasis is placed on the astrophysical feasibility of radiation production and thermalization. Attention is also given to properties of the universe on scales larger than the present particle horizon, and the fact that the universe resembles a Friedmann model on the largest observed scales, but possesses an inhomogeneous structure on scales less than 10 Mpc. This inhomogeneity indicates that, on comoving scales of about 10 Mpc, curvature fluctuations of amplitude 10 to the -4th power were imprinted into the initial conditions.
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