Other
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...255..341b&link_type=abstract
Astrophysical Journal, Part 1, vol. 255, Apr. 15, 1982, p. 341-360. Research supported by the U.S. Department of Energy
Other
22
Baryons, Cosmology, Elementary Particles, Isothermal Processes, Nuclear Fusion, Particle Mass, Astronomical Models, Galactic Evolution, Linear Equations, Particle Flux Density, Perturbation Theory, Universe
Scientific paper
It is hypothesized that baryon density perturbations will result if the baryon asymmetry production occurs at about 10 to the 15th GeV due to baryon nonconservation, as stipulated by grand unified theories. Discussions are presented of the roles of adiabatic perturbations that are generated by density fluctuations, and isothermal perturbations which can be created as a result of local expansion rate spatial variations. The entropy per baryon created in Bianchi I universes with shear, using model systems based on the SU(5) grand unified theory, is calculated numerically, along with an effective viscosity which is used to show that viscous damping of shear is not sufficiently large to smooth the universe. The survival of shear inhomogeneities results in the generation of isothermal perturbations, which could be of the magnitude required for the gravitational instability theory of galaxy formation under specified conditions.
Bond Richard J.
Kolb Edward W.
Silk Joseph
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