论文标题
三维超新星模型为星尘的起源提供了新的见解
Three-dimensional Supernova Models Provide New Insights into the Origins of Stardust
论文作者
论文摘要
我们介绍了两种爆发后，三维15 $ m_ \ odot $核心 - 碰撞超新星模型，15S和15A的同位素产率，并将它们与碳，氮，硅，铝，铝，硫磺，钙，钙，钛，铁，铁和镍同位素组合的碳，铝，铝，铝，硫磺，铝，硫酸和镍的同位素组成。 We find that these core-collapse supernova models predict similar carbon and nitrogen compositions to SiC X grains and grains with $^{12}$C/$^{13}$C $<$ 20 and $^{14}$N/$^{15}$N $<$ 60, which we will hereafter refer to as SiC 'D' grains.核心崩溃后不久，从15 $ m_ \ odot $爆炸的内部材料达到足够高的温度，产生了$^{13} $ c和$^{15} $ n的大浓度，以复制SiC D晶粒的组成。核心崩溃超新星中的最内向的弹射器正在中微子驱动的状态下运行，并在被超新星冲击波加热后经历了快速的质子捕获。两种3-D模型都预测0.3 $ <$ $^{26} $ al/$^{27} $ al $ <$ <$ <$ <$ <$ 1.5，可与SIC X，C和D GRAINS中看到的比率相当。通常，型号15S和15A预测钙同位素的较大异常，但确实与SIC X谷物测量值进行了定论，这些测量显示了$^{44} $ CA和$^{43} $ CA的多余。 SIC X晶粒的钛同位素组合物得到很好的再现。这些模型预测$^{57} $ fe $ fe的过剩和耗尽，这些差异和耗竭还可以准确预测$^{60} $ ni/$ ni/$^{58} $ ni，$^{61} $ ni/$ ni/$ ni/$^{58} $ ni，以及$ ni，以及$ ni，以及$ ni/$ ni/$ ni/$ ni/ni/ni/yiriors，由于超新星冲击波的传播引发的快速中子捕获。最后，对称性对Sn射流中的硅，硫和铁同位素的产生具有明显的影响。
We present the isotope yields of two post-explosion, three-dimensional 15 $M_\odot$ core-collapse supernova models, 15S and 15A, and compare them to the carbon, nitrogen, silicon, aluminum, sulfur, calcium, titanium, iron, and nickel isotopic compositions of SiC stardust. We find that these core-collapse supernova models predict similar carbon and nitrogen compositions to SiC X grains and grains with $^{12}$C/$^{13}$C $<$ 20 and $^{14}$N/$^{15}$N $<$ 60, which we will hereafter refer to as SiC 'D' grains. Material from the interior of a 15 $M_\odot$ explosion reaches high enough temperatures shortly after core collapse to produce the large enrichments of $^{13}$C and $^{15}$N necessary to replicate the compositions of SiC D grains. The innermost ejecta in a core-collapse supernova is operating in the neutrino-driven regime and undergoes fast proton capture after being heated by the supernova shockwave. Both 3-D models predict 0.3 $<$ $^{26}$Al/$^{27}$Al $<$ 1.5, comparable to the ratios seen in SiC X, C, and D grains. Models 15S and 15A, in general, predict very large anomalies in calcium isotopes but do compare qualitatively with the SiC X grain measurements that show $^{44}$Ca and $^{43}$Ca excesses. The titanium isotopic compositions of SiC X grains are well reproduced. The models predict $^{57}$Fe excesses and depletions that are observed in SiC X grains, and in addition predict accurately the $^{60}$Ni/$^{58}$Ni, $^{61}$Ni/$^{58}$Ni, and $^{62}$Ni/$^{58}$Ni ratios in SiC X grains, as a result of fast neutron captures initiated by the propagation of the supernova shockwave. Finally, symmetry has a noticeable effect on the production of silicon, sulfur, and iron isotopes in the SN ejecta.
