由磁旋转超新星驱动的Zn的早期化学演化和太阳Zn组分的途径
Early chemical evolution of Zn driven by magnetorotational supernovae and the pathway to the solar Zn composition
摘要：
锌的产生地点仍然是天体物理学中一个难以捉摸和具有挑战性的问题。星系晕中贫金属恒星的[Zn/Fe]比值的大幅增强表明短寿命大质量恒星的死亡，即，核心塌陷超新星（CCSNe），作为一个主要的网站锌生产。以前的研究声称，一些特定的CCSNe可以产生足够数量的锌。然而，目前尚不清楚哪些模型能够经受住观测的关键考验。使用锌丰度的功能类似的R-过程中的元素在暗淡的卫星星系，我们发现的证据表明，锌生产发生通过更罕见的事件比典型的CCSNe。这一发现可以与隐含的减少锌生产率的金属丰度增加的星系晕星，缩小了锌生产的主要网站在早期星系的磁旋转SNe（MR-SNe）。另一方面，在星系演化的后期，我们预测主要的锌生产网站切换从MR-SNe热核SNe（SNe Ia）。根据这一假设，两种SNe贡献的积累最终导致了Zn的太阳同位素组成，其主要归属于MR-SNe的66，68 Zn和由He爆炸触发的SNe Ia的64 Zn。在超新星Ia中产生锌的需要为超新星Ia祖先的情景的激烈争论提供了新的线索，这表明He爆炸模型可能是超新星Ia的一个主要通道。
英文摘要：
The site of Zn production remains an elusive and challenging problem in astrophysics. A large enhancement of the [Zn/Fe] ratios of very metal-poor stars in the Galactic halo suggests the death of short-lived massive stars, i.e., core-collapse supernovae (CCSNe), as one major site for Zn production. Previous studies have claimed that some specific CCSNe can produce Zn in sufficient quantities. However, it remains unclear which models can withstand the critical test of observations. Using a Zn abundance feature similar to that of r-process elements in faint satellite galaxies, we find evidence that Zn production took place through much rarer events than canonical CCSNe. This finding can be unified with the implied decrease in the rate of Zn production with an increasing metallicity for Galactic halo stars, which narrows down the major site of Zn production in the early galaxy to magneto-rotational SNe (MR-SNe). On the other hand, in the later phase of galactic evolution, we predict that the major Zn-production site switched from MR-SNe to thermonuclear SNe (SNe Ia). According to this scenario, an accumulation of the contributions from two types of SNe eventually led to the solar isotope composition of Zn which mainly owes 66,68Zn to MR-SNe and 64Zn to SNe Ia triggered by He-detonation. The requirement of Zn production in SNe Ia sheds a new light on the hot debate on the scenario for SN Ia progenitors, suggesting that a He-detonation model might be one major channel for SNe Ia.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
