Cosmic nucleosynthesis and nonlinear inhomogeneities

Details Cosmic nucleosynthesis and nonlinear inhomogeneities Cosmic nucleosynthesis and nonlinear inhomogeneities

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986nuphb.266..171c&link_type=abstract

Nuclear Physics B, Volume 266, Issue 1, p. 171-227.

Physics

Nuclear Physics

7

Scientific paper

We present a number of numerical simulations of the synthesis of the light elements in an inhomogeneous big-bang cosmology. A completely relativistic, nonlinear plane-symmetric hydrodynamics and general relativity code provides the geometrical evolution, within which the nucleosynthesis occurs. We argue that our plane symmetry provides realistic modelling of the evolution during this epoch, and that local enhancements or depressions of the element abundances may persist to the present. In any case, the average abundances we find are not identical to the predictions of homogeneous cosmologies. Local abundances fluctuating in the range 22%-22% are typically produced in our models. These models are consistent with all observational constraints, in particular with the observed isotropy of the microwave radiation background.

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