论文标题
部分可观测时空混沌系统的无模型预测
Actinide-boosting r Process in Black Hole-Neutron Star Merger Ejecta
论文作者
论文摘要
我们根据长期中微子 - 辐射 - 纳图水力动力学模拟的结果，检查黑孔中性星星合并射出中的核合成。我们发现动态和合并后喷射的组合再现了类似太阳能的R-Process模式。此外，肌动剂的增强水平对电子馏分的分布和动力喷射的速度都高度敏感。我们的结果表明，动态喷射的平均电子比例应> 〜0.05，以使核合成丰度与R-Process增强的，actinide-Boost-Boost恒星中的核合成丰度调和。由于潮汐喷射可以保留前中子恒星内部外壳中的中子富度，因此，如果黑孔 - 中子恒星合并负责肌动剂 - 促进恒星，则该结果为状态的核方程提供了重要的约束。
We examine nucleosynthesis in the ejecta of black hole-neutron star mergers based on the results of long-term neutrino-radiation-magnetohydrodynamics simulations for the first time. We find that the combination of dynamical and post-merger ejecta reproduces a solar-like r-process pattern. Moreover, the enhancement level of actinides is highly sensitive to the distribution of both electron fraction and the velocity of the dynamical ejecta. Our result implies that the mean electron fraction of dynamical ejecta should be >~ 0.05 in order to reconcile the nucleosynthetic abundances with those in r-process-enhanced, actinide-boost stars. Since the tidal ejecta preserve the neutron-richness in the inner crust of pre-merging neutron stars, this result provides an important constraint for nuclear equations of state, if black hole-neutron star mergers are responsible for actinide-boost stars.
