Large Scale Baryon Isocurvature Inhomogeneities

Details Large Scale Baryon Isocurvature Inhomogeneities Large Scale Baryon Isocurvature Inhomogeneities

1994-10-03

arxiv.org/abs/astro-ph/9410007v1

Astrophys. J.451:51,1995

Astronomy and Astrophysics

Astrophysics

11pages + 8figures, LaTeX (2.09), postscript figures available via anonymous ftp from oddjob.uchicago.edu:/ftp/ibbn/fig?.ps wh

Scientific paper

10.1086/176199

Big bang nucleosynthesis constraints on baryon isocurvature perturbations are determined. A simple model ignoring the effects of the scale of the perturbations is first reviewed. This model is then extended to test the claim that large amplitude perturbations will collapse, forming compact objects and preventing their baryons from contributing to the observed baryon density. It is found that baryon isocurvature perturbations are constrained to provide only a slight increase in the density of baryons in the universe over the standard homogeneous model. In particular it is found that models which rely on power laws and the random phase approximation for the power spectrum are incompatible with big bang nucleosynthesis unless an {\em ad hoc}, small scale cutoff is included.

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