论文标题
核培养基对中子恒星合并期间中子捕获反应的影响
Nuclear medium effect on neutron capture reactions during neutron star mergers
论文作者
论文摘要
引力波的发现证实了旧的理论预测，即由紧凑型恒星形成的二元系统不仅对宇宙学和核天体物理学起着至关重要的作用。作为这些副产品和随后的观察结果，现在很明显，按照一系列被称为R过程的快速中子捕获反应，中子恒星合并可以成为产生比宇宙中一半元素重的一半元素的竞争地点。在本文中，我们讨论了迄今为止在中子恒星合并中的R过程核合成计算中忽略的效果。我们表明，由于中子环境在相对较小的中子密度下，在中子恒星合并的数值流体动力模拟范围内以及R过程开始后的校正，不可忽略不计，需要考虑到由观察确定的元素丰富度。
The discovery of gravitational waves has confirmed old theoretical predictions that binary systems formed with compact stars play a crucial role not only for cosmology and nuclear astrophysics. As a byproduct of these and subsequent observations, it is now clear that neutron-star mergers can be a competitive site for the production of half of the elements heavier than iron in the universe following a sequence of fast neutron capture reactions known as the r process. In this article we discuss an effect which has been so far neglected in calculations of r-process nucleosynthesis in neutron star mergers. We show that the corrections due to the neutron environment even at relatively small neutron densities, within the bounds of numerical hydrodynamical simulations of neutron star mergers and after the onset of the r process, are non-negligible and need to be taken into account to accurately describe the elemental abundance as determined by observations.
