Astronomy and Astrophysics – Astrophysics
Scientific paper
1993-12-30
Astrophys.J. 422 (1994) 423-429
Astronomy and Astrophysics
Astrophysics
19 pages in plain Tex, 5 figures (not included) available by fax or mail upon request, ApJ in press, L2
Scientific paper
10.1086/173738
We show that primordial nucleosynthesis in baryon inhomogeneous big-bang models can lead to significant heavy-element production while still satisfying all the light-element abundance constraints including the low lithium abundance observed in population II stars. The parameters which admit this solution arise naturally from the process of neutrino induced inflation of baryon inhomogeneities prior to the epoch of nucleosynthesis. These solutions entail a small fraction of baryons (\le 2\%) in very high density regions with local baryon-to-photon ratio $\eta^h\approx 10^{-4}$, while most baryons are at a baryon-to-photon ratio which optimizes the agreement with light-element abundances. The model would imply a unique signature of baryon inhomogeneities in the early universe, evidenced by the existence of primordial material containing heavy-element products of proton and alpha- burning reactions with an abundance of $[Z]\sim -6 to -4$.
Fuller George M.
Jedamzik Karsten
Kajino Taka
Mathews Grant J.
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