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arXiv 2602.23356astro-ph.GAastro-ph.HE
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重新审视Perseus团III:非球形爆炸在其化学组成和扩展到金属贫乏恒星和星系中的作用

Revisiting the Perseus Cluster III: Role of Aspherical Explosions on its Chemical Composition and Extension to Metal-Poor Stars and Galaxies

SUNY Polytechnic Institute(纽约州立大学波利技术学院);The University of Tokyo(东京大学);SRON Netherlands Institute for Space Research(荷兰空间研究所)

Shing-Chi Leung, Henry Yerdon, Seth Walther, Ken'ichi Nomoto, Aurora Simionescu

AI总结:

本文研究非球形爆炸对Perseus团化学组成的影响,通过引入喷流引发爆炸机制,探讨其对元素丰度分布及银河化学演化的贡献。

摘要:

Perseus团通过Hitomi望远镜对Si组(Si, S, Ar, Ca)和Fe组元素(Cr, Mn, Ni)的精确测量提供了超新星典型行为的洞察。在论文II中,我们提出了不同金属licity下的新大质量恒星爆炸模型,假设球形爆炸。本文扩展了计算,采用喷流引发爆炸机制进行非球形爆炸。通过大规模后处理网络计算详细的爆炸前和爆炸后化学剖面,捕捉奇数元素(V, Mn, Cu)和铁组元素的产生。进一步探讨喷流驱动爆炸如何创造多样化的模型,与观测到的$^{56}$Ni质量与喷射质量、Ti-V关系和恒星丰度的多样性相容。最后,将新 collapsar 模型应用于银河化学演化的背景下,研究银河系恒星(包括富含Zn的恒星HE 1327-2326)对 collapsar 和其模型参数相对速率的约束。我们表明 collapsar 可能导致某些元素(如Zn)的显著变化。本研究显示 collapsar 是解释银河系多个元素趋势的必要组成部分。

英文摘要:

The Perseus Cluster has been precisely measured by the legacy Hitomi telescope on the Si-group (Si, S, Ar, Ca) and Fe-group elements (Cr, Mn, Ni). These element abundance ratios provide insight into the typical behaviour of supernovae. In Paper II, we presented new massive star explosion models at various metallicity, assuming spherical explosions. We show that while the fitting is improved, some features (e.g., Ni/Fe) remain to be improved. In this article, we extend our calculation to an aspherical explosion using the jet-induced explosion mechanism. The detailed pre- and post-explosion chemical profiles are calculated with a large post-processing network to capture the production of odd-number elements (V, Mn, Cu) and iron-group elements. We further explore how the jet-driven explosions create the diversity of models which could be compatible with the observed diversity in terms of $^{56}$Ni-mass vs ejecta mass, Ti-V relation, and stellar abundances. Finally, we apply the new collapsar models in the Galactic Chemical Evolution context. We study how the galactic stars, including the Zn-enriched star HE 1327-2326, can put constraints on the relative rates of collapsar and some of its model parameters. We show that collapsar could lead to significant changes in some elements, e.g., Zn. Our study shows that the collapsar is a necessary component to explain multiple elemental trends observed in the Milky Way Galaxy.

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。

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