非均匀原始核合成：耦合核反应与流体动力学耗散过程
摘要
我们详细研究了非均匀大爆炸核合成，其中对于第一时间，核反应被耦合到所有显著涨落耗散过程。这些过程包括 neutrino 热输运、质子扩散、光子扩散热输运以及光子-电子 Thomson 阻力下的流体动力学膨胀。 presented for broad ranges of initial amplitudes and length scales for spherically condensed fluctuations. The H, He, He, and Li nucleosynthesis yields are found to be inconsistent with observationally inferred primordial abundances for all but very narrow ranges of fluctuation characteristics. Rapid hydrodynamic expansion of fluctuations late in the nucleosynthesis epoch results in significant destruction of Li (Be) only if the baryonic conytribution to the closure density () is less than or comparable to the upper limit on this quantity from homogeneous Big Bang nucleosynthesis. This implies that Li overproduction will peclude an increase on the upper limit for for any inhomogeneous nucleosynthesis scenarios employing spherically condensed fluctuations.
引用
@article{arxiv.astro-ph/9312065,
title = {Inhomogeneous Primordial Nucleosynthesis: Coupled Nuclear Reactions and Hydrodynamic Dissipation Processes},
author = {K. Jedamzik and G. M. Fuller and G. J. Mathews},
journal= {arXiv preprint arXiv:astro-ph/9312065},
year = {2009}
}
备注
30 pages in plain Tex, 17 figures (not included) available by fax or mail upon request, ApJ in press, L1