Heavy element production in inhomogeneous big bang nucleosynthesis

Abstract

We present a new astrophysical site of the big bang nucleosynthesis (BBN) that are very peculiar compared with the standard BBN. Some models of the baryogenesis suggest that very high baryon density regions were formed in the early universe. On the other hand, recent observations suggest that heavy elements already exist in high red-shifts and the origin of these elements become a big puzzle. Motivated by these, we investigate BBN in very high baryon density regions. BBN proceeds in proton-rich environment, which is known to be like the p-process. However, by taking very heavy nuclei into account, we find that BBN proceeds through both the p-process and the r-process simultaneously. P-nuclei such as $^{92}\mathrm{M}\mathrm{o}$, $^{94}\mathrm{M}\mathrm{o}$, $^{96}\mathrm{R}\mathrm{u}$, $^{98}\mathrm{R}\mathrm{u}$ whose origin is not well known are also synthesized.